An object is thrown vertically upwards from the top of a cliff with a velocity of \(25ms^{-1}\). Find the time, in seconds, when it is 20 metres above the cliff. \([g = 10ms^{-2}]\).
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2013
Given that \(P = \begin{pmatrix} y - 2 & y - 1 \\ y - 4 & y + 2 \end{pmatrix}\) and |P| = -23, find the value of y.
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2013
Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), find y.
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2013
Find the range of values of x for which \(x^{2} + 4x + 5\) is less than \(3x^{2} - x + 2\)
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2013
The fourth term of an exponential sequence is 192 and its ninth term is 6. Find the common ratio of the sequence.
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2013
Differentiate \(x^{2} + xy - 5 = 0\).
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2013
Find the equation of the line that is perpendicular to \(2y + 5x - 6 = 0\) and bisects the line joining the points P(4, 3) and Q(-6, 1).
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2013
Given that \(f(x) = 2x^{3} - 3x^{2} - 11x + 6\) and \(f(3) = 0\), factorize f(x).
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2013
If \(\alpha\) and \(\beta\) are the roots of the equation \(2x^{2} - 6x + 5 = 0\), evaluate \(\frac{\beta}{\alpha} + \frac{\alpha}{\beta}\).
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2013
If \(\sqrt{x} + \sqrt{x + 1} = \sqrt{2x + 1}\), find the possible values of x.
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2013
Find the third term in the expansion of \((a - b)^{6}\) in ascending powers of b.
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2013
If \(f(x) = x^{2}\) and \(g(x) = \sin x\), find g o f.
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2013
Express \(\log \frac{1}{8} + \log \frac{1}{2}\) in terms of \(\log 2\).
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2013
Given that \(a^{\frac{5}{6}} \times a^{\frac{-1}{n}} = 1\), solve for n.
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2013
Solve: \(\sin \theta = \tan \theta\)
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2013
A binary operation * is defined on the set of real numbers, R, by \(x * y = x + y - xy\). If the identity element under the operation * is 0, find the inverse of \(x \in R\).