600 results authored by Newcastle University Mathematics and Statistics - search across all users.
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Question in Content created by Newcastle University
Real numbers a,b,c and d are such that a+b+c+d=1 and for the given vectors v1,v2,v3,v4 av1+bv2+cv3+dv4=0. Find a,b,c,d.
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Question in Content created by Newcastle University
Finding the confidence interval at either 90%, 95% or 99% for the mean given the mean and standard deviation of a sample. The population variance is not given and so the t test has to be used. Various scenarios are included.
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Question in Content created by Newcastle University
Multiplication and addition of complex numbers. Four parts.
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Question in Content created by Newcastle University
Directional derivative of a scalar field.
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Question in Content created by Newcastle University
Solving an equation of the form ax≡bmodn where a and n are coprime.
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Question in Content created by Newcastle University
Reduce a 5x6 matrix to row reduced form and using this find rank and nullity.
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Question in Content created by Newcastle University
Differentiate the function f(x)=(a+bx)menx using the product rule. Find g(x) such that f′(x)=(a+bx)m−1enxg(x).
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Question in Content created by Newcastle University
Finding the confidence interval at either 90%, 95% or 99% for the mean given the mean of a sample. The population variance is given and so the z values are used. Various scenarios are included.
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Question in Content created by Newcastle University
Finding the confidence interval at either 90%, 95% or 99% for the mean given the mean of a sample. The population variance is given and so the z values are used. Various scenarios are included.
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Question in Content created by Newcastle University
Finding the modulus and argument (in radians) of four complex numbers; the arguments between −π and π and careful with quadrants!
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Question in Content created by Newcastle University
Find modulus and argument of two complex numbers. Then use De Moivre's Theorem to find positive powers of the complex numbers.
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Question in Content created by Newcastle University
Find modulus and argument of the complex number z1 and find the nth roots of z1 where n=5,6 or 7.
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Question in Content created by Newcastle University
Factorise ax2+bx+c into linear factors.
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Question in Content created by Newcastle University
Given a generating matrix for a linear code, give a parity check matrix
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
Rolling a pair of dice. Find probability that at least one die shows a given number.
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Question in Content created by Newcastle University
English sentences which are propositions are given and the appropriate logical expression chosen for the negation of the sentence.
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Question in Content created by Newcastle University
English sentences which are propositions are given and for each the appropriate proposition involving quantifiers is to be chosen.
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Question in Content created by Newcastle University
Write down the lexicographic parity check matrix and generator matrix for a Hamming code, which is the dual of a Simplex code, then determine if a given word is a codeword of the corresponding Simplex code.
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Question in Content created by Newcastle University
Compute tables of Hamming distances in given codes, then determine which codes are equivalent.
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Question in Content created by Newcastle University
Given a generating matrix for a binary linear code, construct a parity check matrix, list all the codewords, list all the words in a given coset, give coset leaders, calculate syndromes for each coset, correct a codeword with one error.
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Question in Content created by Newcastle University
Express ax+b±cx+d as an algebraic single fraction over a common denominator.
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Question in Content created by Newcastle University
Using a given list of four complex numbers, find by inspection the one that is a root of a given cubic real polynomial and hence find the other roots.
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Question in Content created by Newcastle University
Putting a pair of linear equations into matrix notation and then solving by finding the inverse of the coefficient matrix.
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Question in Content created by Newcastle University
Given normal distribution N(m,σ2) find P(a<X<b),a<m,b>m and also find the value of X corresponding to a given percentile p%.
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Question in Content created by Newcastle University
Find ∫2ax+bax2+bx+cdx
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Exam (6 questions) in Content created by Newcastle University
This is out of date. There is a new "getting statrted" exam at https://numbas.mathcentre.ac.uk/exam/21108/getting-started/
6 questions which introduce the user to the Numbas system.
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Question in Content created by Newcastle University
Questions testing understanding of the index laws.
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Question in Content created by Newcastle University
Questions testing rather basic understanding of the index laws.
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Question in Content created by Newcastle University
Find ab+cd as a single fraction in the form pq for integers p and q.