Two functions f and g are defined on the set of real numbers by \(f : x \to x^{2} + 1\) and \(g : x \to x - 2\). Find f o g.
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40 questionsA car is moving at 120\(kmh^{-1}\). Find its speed in \(ms^{-1}\).
A particle starts from rest and moves through a distance \(S = 12t^{2} - 2t^{3}\) metres in time t seconds. Find its acceleration in 1 second.
Find the constant term in the binomial expansion \((2x^{2} + \frac{1}{x})^{9}\)
Find the angle between forces of magnitude 7N and 4N if their resultant has a magnitude of 9N.
A body of mass 28g, initially at rest is acted upon by a force, F Newtons. If it attains a velocity of \(5.4ms^{-1}\) in 18 seconds, find the value of F.
If \(\overrightarrow{OX} = \begin{pmatrix} -7 \\ 6 \end{pmatrix}\) and \(\overrightarrow{OY} = \begin{pmatrix} 16 \\ -11 \end{pmatrix}\), find \(\overrightarrow{YX}\).
What is the probability of obtaining a head and a six when a fair coin and and a die are tossed together?
Given that \(a = i - 3j\) and \(b = -2i + 5j\) and \(c = 3i - j\), calculate \(|a - b + c|\).
The marks scored by 4 students in Mathematics and Physics are ranked as shown in the table below
| Mathematics | 3 | 4 | 2 | 1 |
| Physics | 4 | 3 | 1 | 2 |
Calculate the Spearmann's rank correlation coefficient.
Out of 70 schools, 42 of them can be attended by boys and 35 can be attended by girls. If a pupil is selected at random from these schools, find the probability that he/ she is from a mixed school.
Evaluate \(\int_{-1}^{1} (x + 1)^{2}\mathrm {d} x\).
Calculate the standard deviation of 30, 29, 25, 28, 32 and 24.
Evaluate \(\int_{\frac{1}{2}}^{1} \frac{x^{3} - 4}{x^{3}} \mathrm {d} x\).
Find the stationary point of the curve \(y = 3x^{2} - 2x^{3}\).
The midpoint of M(4, -1) and N(x, y) is P(3, -4). Find the coordinates of N.
Given that \(y = x(x + 1)^{2}\), calculate the maximum value of y.
Find the equation to the circle \(x^{2} + y^{2} - 4x - 2y = 0\) at the point (1, 3).
Express \(\frac{13}{4}\pi\) radians in degrees.
If the determinant of the matrix \(\begin{pmatrix} 2 & x \\ 3 & 5 \end{pmatrix} = 13\), find the value of x.