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WAEC Further Mathematics Past Questions & Answers - Page 39

191.

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) q

B.

(r ^~ p) q

C.

(r ^ q) p

D.

(r ~ ^ p) q

Correct answer is A

No explanation has been provided for this answer.

192.

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

A.

13

B.

11

C.

-1

D.

-9

Correct answer is B

g(-3) = 5 - 2(-3)

= 5 + 6 = 11

193.

A linear transformation is defined by T: (x, y) (-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)

Correct answer is A

Q(3 -3, 2) = [-(-3) + 2, -4(2)]

= (3 + 2, -8) 

= (5, -8) 

194.

Given that g ; x 3x and f ; x cos x. Find the value of go f(20o

A.

0.50

B.

0.94

C.

2.60

D.

2.82

Correct answer is D

f(20o) = cos 20o = 0.9397

g(0.9397) = 3(0.9397)

= 2.82