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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.

396.

If 163x=14(32x1), find the value of x.

A.

1

B.

13

C.

37

D.

519

Correct answer is A

163x=14(32x1)

(24)3x=(22)((25)x1)

212x=22+5x5

12x=7+5x

7x=7x=1

397.

If 5288=m2, where m is a constant. Find m.

A.

112

B.

114

C.

214

D.

212

Correct answer is C

52=5×22×2=522

88=228=24

5288=(5214)2

= 942

= 2142

398.

Find the value of \cos(60° + 45°) leaving your answer in surd form

A.

\frac{6 + \sqrt{2}}{4}

B.

\frac{3 + \sqrt{6}}{4}

C.

\frac{\sqrt{2} - \sqrt{6}}{4}

D.

\frac{3 - \sqrt{6}}{4}

Correct answer is C

\cos (x + y) = \cos x \cos y - \sin x \sin y

\cos (60 + 45) = \cos 60 \cos 45 - \sin 60 \sin 45

= \frac{1}{2} \times \frac{\sqrt{2}}{2} - \frac{\sqrt{3}}{2} \times \frac{\sqrt{2}}{2}

= \frac{\sqrt{2} - \sqrt{6}}{4}

399.

Find the domain of f(x) = \frac{x}{3 - x}, x \in R, the set of real numbers.

A.

{x : x \in R, x \neq 3}

B.

{x : x \in R, x \neq 1}

C.

{x : x \in R, x \neq 0}

D.

{x : x \in R, x\neq -3}

Correct answer is A

f(x) = \frac{x}{3 - x}

f(x) has a defined value except at x = 3 where the function is undefined.

400.

Find, correct to two decimal places, the acute angle between p = \begin{pmatrix} 13 \\ 14 \end{pmatrix} and q = \begin{pmatrix} 12 \\ 5 \end{pmatrix}.

A.

23.52°

B.

24.50°

C.

29.52°

D.

29.82°

Correct answer is B

p . q = |p||q|\cos \theta

156 + 70 = (\sqrt{13^{2} + 14^{2}})(\sqrt{12^{2} + 5^{2}}) \cos \theta

226 = (\sqrt{365})(13) \cos \theta

\frac{226}{13\sqrt{365}} = \cos \theta

\cos \theta = 0.9099

\theta = 24.50°