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.

101.

Given that F\(^1\)(x) = x\(^3\)√x, find f(x)

A.

\( \frac{2x^{9/2}}{9} + c \)

B.

\( 2x^{9/2} + c \)

C.

\( \frac{2x^{5/2}}{5} + c \)

D.

\( x^4 + c \)

Correct answer is A

F1 (x) = x\(^3\) √x = x\(^{7/2}\)

F(x) = \(\frac{x^{7/2 +1}}{7/2 + 1}\) + c

= \(\frac{x^{9/2}}{9/2}\)

= \(\frac{2x^{9/2}}{9}\) + c

102.

A stone is thrown vertically upward and distance, S metres after t seconds is given by S = 12t + \(\frac{5}{2t^2}\) - t\(^3\).

Calculate the distance travelled in the third second.

A.

5.5m

B.

14.5m

C.

26.0m

D.

30.0m

Correct answer is A

From  S = 12t + \(\frac{5}{2t^2}\) - t\(^3\);

Distance traveled in 2 seconds

 S = 12[2] + \(\frac{5}{2[2]^2}\) - 2\(^3\).

= 24 + 10 - 8 = 26m

Distance traveled in 3 seconds

 S = 12[3] + \(\frac{5}{2[3]^2}\) - 3\(^3\)

= 36 + 22.5 - 27 = 31.5m

Distance traveled in the 3rd second

= 31.5m - 26m

: S = 5.5m

103.

A stone is thrown vertically upward and distance, S metres after t seconds is given by S = 12t + \(\frac{5}{2t^2}\) - t\(^3\).

Calculate the maximum height reached.

A.

418.5m

B.

56.0m

C.

31.5m

D.

30.0m

Correct answer is C

S = 12t + \(\frac{5}{2t^2}\) - t\(^3\);

ds/dt =  12 + 5t - 3t\(^2\)

At max height ds/dt = 0

i.e 12 + 5t - 3t\(^2\)

(3t + 4)(t -3) = 0;

t = -4/3 or 3

Hmax = 12[3] + \(\frac{5}{2[3]^2}\) - 3\(^3\)

= 36 + 45/2 - 27

= 31.5m

104.

In △PQR, \(\overline{PQ}\) = 5i - 2j and \(\overline{QR}\) = 4i + 3j. Find \(\overline{RP}\)

A.

-i - 5j

B.

-9 - j

C.

i + 5j

D.

-9i + j

Correct answer is A

\(\overline{PQ}\) = 5i - 2j;  \(\overline{QR}\) = 4i + 3j

 \(\overline{RP}\) = \(\overline{PQ}\) - \(\overline{QR}\)

= 5i - 2j - [4i + 3j] =  5i - 2j - 4i - 3j

= i - 5j

105.

Three forces, F\(_1\) (8N, 030°), F\(_\2) (10N, 150° ) and F\(_\3) ( KN, 240° )are in equilibrium. Find the value of N

A.

5√3

B.

6√2

C.

6√3

D.

9√3

Correct answer is C

No explanation has been provided for this answer.