Further Mathematics questions and answers

Further Mathematics Questions and Answers

Test your knowledge of advanced level mathematics with this aptitude test. This test comprises Further Maths questions and answers from past JAMB and WAEC examinations.

346.

The roots of a quadratic equation are -3 and 1. Find its equation.

A.

\(x^{2} - 3x + 1 = 0\)

B.

\(x^{2} - 2x + 1 = 0\)

C.

\(x^{2} + 2x - 3 = 0\)

D.

\(x^{2} + x - 3 = 0\)

Correct answer is C

Given the roots of an equation such that you can find the sum and product of the roots, the equation can be given as:

\(x^{2} - (\alpha + \beta)x + (\alpha \beta) = 0 \)

\(\alpha + \beta = -3 + 1 = -2\)

\(\alpha \beta = -3 \times 1 = -3\)

Equation: \(x^{2} - (-2)x + (-3) = 0 \implies x^{2} + 2x - 3 = 0\)

347.

p and q are statements such that \(p \implies q\). Which of the following is a valid conclusion from the implication?

A.

\(q \implies p\)

B.

\(\sim q \implies p\)

C.

\(\sim q \implies \sim p\)

D.

\(\sim p \implies \sim q\)

Correct answer is C

No explanation has been provided for this answer.

348.

The first term of a geometric progression is 350. If the sum to infinity is 250, find the common ratio.

A.

\(\frac{-5}{7}\)

B.

\(-\frac{2}{5}\)

C.

\(\frac{2}{5}\)

D.

\(\frac{5}{7}\)

Correct answer is B

\(S_{\infty} = \frac{a}{1 - r}\) (Sum to infinity of a GP)

\(250 = \frac{350}{1 - r} \implies 250(1 - r) = 350\)

\(350 = 250 - 250r \implies 350 - 250 = -250r\)

\(250r = -100 \implies r = \frac{-100}{250} = -\frac{2}{5}\)

349.

An arc of length 10.8 cm subtends an angle of 1.2 radians at the centre of a circle. Calculate the radius of the circle.

A.

12.6 cm

B.

12.0 cm

C.

9.6 cm

D.

9.0 cm

Correct answer is D

Length of arc (in radians) = \(r \theta\)

\(10.8 = 1.2r\)

\(r = \frac{10.8}{1.2} = 9.0 cm\)

350.

The gradient of point P on the curve \(y = 3x^{2} - x + 3\) is 5. Find the coordinates of P.

A.

(1, 5)

B.

(1, 7)

C.

(1, 13)

D.

(1, 17)

Correct answer is A

\(y = 3x^{2} - x + 3\)

\(\frac{\mathrm d y}{\mathrm d x} = 6x - 1 = 5\)

\(6x = 5 + 1 = 6 \implies x = 1\)

\(y = 3(1^{2}) - 1 + 3 = 3 - 1 + 3 = 5\)

\(P = (1, 5)\)