// Numbas version: exam_results_page_options {"name": "David's copy of Logs: definition and concrete numbers", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"advice": "", "parts": [{"steps": [{"scripts": {}, "variableReplacementStrategy": "originalfirst", "type": "information", "prompt": "

The definition of a logarithm says if $b$ and $a$ are positive and $b$ is not equal to 1, then  $\\log_b(a)=c$ is equivalent to $b^c=a$.

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This means to determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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$b^c=a$

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$b^a=c$

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$a^b=c$

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$a^c=b$

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$c^a=b$

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$c^b=a$

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The definition of a logarithm says if $b$ and $a$ are positive and $b$ is not equal to 1, then  $\\log_b(a)=c$ is equivalent to:

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The definition of a logarithm says if $b$ and $a$ are positive and $b$ is not equal to 1, then  $\\log_b(a)=c$ is equivalent to $b^c=a$.

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This means to determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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$\\log_x (z)=y$

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$\\log_x (y)=z$

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$\\log_y (x)=z$

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$\\log_y (z)=x$

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$\\log_z (y)=x$

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$\\log_z (x)=y$

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The definition of a logarithm says that if $x$ and $z$ are positive and $x$ is not equal to 1, then $x^y=z$ is equivalent to:

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To determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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To determine $\\log_{\\var{zero[0]}}(\\var{zero[0]^zero[1]})$, realise $\\var{zero[0]}^0=\\var{zero[0]^zero[1]}$ and so $\\log_{\\var{zero[0]}}(\\var{zero[0]^zero[1]})=0$.

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Using the definition and your times tables determine the following:

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$\\log_{\\var{zero[0]}}(\\var{zero[0]^zero[1]})$ = [[0]]

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To determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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To determine $\\log_{\\var{one[0]}}(\\var{one[0]^one[1]})$, realise $\\var{one[0]}^1=\\var{one[0]}$ and so $\\log_{\\var{one[0]}}(\\var{one[0]^one[1]})=1$.

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Using the definition and your times tables determine the following:

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$\\log_{\\var{one[0]}}(\\var{one[0]^one[1]})$ = [[0]]

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To determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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To determine $\\log_{\\var{two[0]}}(\\var{two[0]^two[1]})$, realise $\\var{two[0]}^2=\\var{two[0]^2}$ and so $\\log_{\\var{two[0]}}(\\var{two[0]^two[1]})=2$.

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Using the definition and your times tables determine the following:

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$\\log_{\\var{two[0]}}(\\var{two[0]^two[1]})$ = [[0]]

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To determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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To determine $\\log_{\\var{small[0]}}(\\var{small[0]^small[1]})$, realise $\\var{small[0]}^\\var{small[1]}=\\var{small[0]^small[1]}$ and so $\\log_{\\var{small[0]}}(\\var{small[0]^small[1]})=\\var{small[1]}$.

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Using the definition and your times tables determine the following:

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$\\log_{\\var{small[0]}}(\\var{small[0]^small[1]})$ = [[0]]

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To determine the value of $\\log_b(a)$, you can think \"$b$ to the what equals $a$\", and that will be your answer.

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To determine $\\log_{\\var{tens[0]}}(\\var{tens[0]^tens[1]})$, realise $\\var{tens[0]}^\\var{tens[1]}=\\var{tens[0]^tens[1]}$ and so $\\log_{\\var{tens[0]}}(\\var{tens[0]^tens[1]})=\\var{tens[1]}$.

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Recall that $10^n$ is the same as a $1$ with $n$ zeros behind it.

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Using the definition and your times tables determine the following:

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$\\log_{\\var{tens[0]}}(\\var{tens[0]^tens[1]})$ = [[0]]

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The following should be completed without the use of a calculator.

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