Waec Further Mathematics 2019 Past Questions and Answers

Question 6:

• 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 7:

• 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 8:

• 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)

Question 9:

• WAEC 2019

If g : r \(\to\) 5 - 2r, r is a real number, find the image of -3

A. 13
B. 11
C. -1
D. -9

Question 10:

• WAEC 2019

Consider the following statements:
p: Birds fly
q: The sky is blue
r: The grass is green
What is the symbolic representation of "If the grass is green and the sky is not blue, then the birds do not fly"?

A. A. (r ^ p) \(\to\) q(r ^~ p) \(\to\) q
B. (r ^ q) \(\to\) p
C. (r ~ ^ p) \(\to\) q