Waec Further Mathematics Past Questions and Answers

Question 631:

• WAEC 2019

Rationalize; \(\frac{1}{\sqrt{2 + 1}}\)

A. \(\sqrt{2}\) - 1
B. 1 - \(\sqrt{2}\)
C. \(\frac{\sqrt{2} - 1}{2}\)
D. \(\frac{1 - \sqrt{2}}{2}\)

Question 632:

• WAEC 2019

If \(^nC_2\) = 15, find the value of n

A. 8
B. 7
C. 6
D. 5

Question 633:

• WAEC 2019

An operation (*) is defined on the set T = {-1, 0, ...., 5} by x * y = x + y - xy. Which of the following operation(s) will give an image which is an element of T?
I. 2(*)5 II. 3(*)5 III. 3(*)4

A. I only
B. II only
C. I and III only
D. II and III only

Question 634:

• WAEC 2019

Given that g ; x \(\to\) 3x and f ; x \(\to\) cos x. Find the value of g\(^o\) f(20\(^o\))

A. 0.50
B. 0.94
C. 2.60
D. 2.82

Question 635:

• WAEC 2019

A linear transformation is defined by T: (x, y) \(\to\) (-x + y, -4y). Find the image, Q`, of Q(-3, 2) under T

A. Q`(5, -8)
B. Q`(-8, 5)
C. Q`(5, -3)
D. Q`(-5, -8)