// Numbas version: exam_results_page_options {"name": "Indices: power of zero (non-algebraic)", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"functions": {}, "ungrouped_variables": ["int1", "dec1", "nint1", "num1", "den1", "int2", "num2", "den2", "smallint1", "smallint2", "base"], "name": "Indices: power of zero (non-algebraic)", "tags": ["0 power", "exponent", "exponents", "index", "indices", "power", "power of 0", "powers", "zero power"], "advice": "", "rulesets": {}, "parts": [{"stepsPenalty": "1", "prompt": "

For an insight into an index of 0, consider the following table: 

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
index form$\\var{base}^3$$\\var{base}^2$$\\var{base}^1$$\\var{base}^0$
result$\\var{base^3}$$\\var{base^2}$$\\var{base}$[[0]]
\n

Notice each time the power decreases by $1$, the result is divided by $\\var{base}$. Using this idea, fill in the rest of the table.

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": true, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Each time you reduce the power by 1 you divide the result by the base, that is $\\var{base}$. Following this pattern:

\\[\\var{base}^{0}=\\frac{\\var{base}}{\\var{base}}=1\\]

\n

From this we conclude that any non-zero number to the power of 0 is 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$\\var{int1}^0$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Any non-zero number to the power of 0 is 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$\\var{dec1}^0$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Any non-zero number to the power of 0 is 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$(\\var{nint1})^0$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Any non-zero number to the power of 0 is 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$-(\\var{int2})^0$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "-1", "minValue": "-1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Here $\\var{int2}$ is to the power of zero and so it evaluates to $1$. However, there is still a negative sign in front, so the answer must be $-1$. 

\n

\n

Note the power of zero is only acting on what is inside the brackets.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$\\displaystyle\\left(\\simplify{{num1}/{den1}}\\right)^0$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Any non-zero number to the power of 0 is 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$\\displaystyle\\frac{\\var{num2}^0}{\\var{den2}}$ = [[0]]

\n

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": true, "variableReplacements": [], "maxValue": "1/{den2}", "minValue": "1/{den2}", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": true, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Note that the power of zero is only acting on the numerator. As such the numerator is equal to $1$ and the denominator remains untouched.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$(\\var{int1}\\times\\var{int2})^0$ = [[0]]

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "1", "minValue": "1", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

Regardless of the result of the multiplication the power of zero will force it to evaluate to 1.

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}, {"stepsPenalty": "1", "prompt": "

$\\var{smallint1}\\times\\var{smallint2}^0$ = [[0]]

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "gaps": [{"allowFractions": false, "variableReplacements": [], "maxValue": "{smallint1}", "minValue": "{smallint1}", "variableReplacementStrategy": "originalfirst", "correctAnswerFraction": false, "showCorrectAnswer": true, "scripts": {}, "marks": 1, "type": "numberentry", "showPrecisionHint": false}], "steps": [{"prompt": "

The power of zero is only acting on the second number in the product. It is only this number that will become 1. 

", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "scripts": {}, "marks": 0, "type": "information"}], "scripts": {}, "marks": 0, "showCorrectAnswer": true, "type": "gapfill"}], "statement": "

Evaluate the following, without the use of a calculator:

", "variable_groups": [], "variablesTest": {"maxRuns": 100, "condition": ""}, "preamble": {"css": "", "js": ""}, "variables": {"smallint1": {"definition": "random(2..12)", "templateType": "anything", "group": "Ungrouped variables", "name": "smallint1", "description": ""}, "smallint2": {"definition": "random(2..12)", "templateType": "anything", "group": "Ungrouped variables", "name": "smallint2", "description": ""}, "num1": {"definition": "random(1..56)", "templateType": "anything", "group": "Ungrouped variables", "name": "num1", "description": ""}, "num2": {"definition": "random(3..56)", "templateType": "anything", "group": "Ungrouped variables", "name": "num2", "description": ""}, "den2": {"definition": "random(3..56 except num2)", "templateType": "anything", "group": "Ungrouped variables", "name": "den2", "description": ""}, "den1": {"definition": "random(3..56 except num1)", "templateType": "anything", "group": "Ungrouped variables", "name": "den1", "description": ""}, "int2": {"definition": "random(13..77)", "templateType": "anything", "group": "Ungrouped variables", "name": "int2", "description": ""}, "base": {"definition": "random(2,5,10,3)", "templateType": "anything", "group": "Ungrouped variables", "name": "base", "description": ""}, "int1": {"definition": "random(1..31415)", "templateType": "anything", "group": "Ungrouped variables", "name": "int1", "description": ""}, "nint1": {"definition": "random(-144..-1)", "templateType": "anything", "group": "Ungrouped variables", "name": "nint1", "description": ""}, "dec1": {"definition": "random(0.001..1.999#0.001)", "templateType": "anything", "group": "Ungrouped variables", "name": "dec1", "description": ""}}, "metadata": {"notes": "", "description": "", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "type": "question", "showQuestionGroupNames": false, "question_groups": [{"name": "", "pickingStrategy": "all-ordered", "pickQuestions": 0, "questions": []}], "contributors": [{"name": "Ben Brawn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/605/"}]}]}], "contributors": [{"name": "Ben Brawn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/605/"}]}