Waec Further Mathematics 2020 Past Questions and Answers

Question 26:

• WAEC 2020

Find the unit vector in the direction opposite to the resultant of forces. F\(_1\) = (-2i - 3j) and F\(_2\) = (5i - j)

A. \(\frac{1}{5}\)(-3i - 4j)
B. \(\frac{1}{5}\)(-3i + 4j)
C. \(\frac{1}{5}\)(3i - 4j)
D. \(\frac{1}{5}\)(3i + 4j)

Question 27:

• WAEC 2020

If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m.

A. - 2.5
B. - 2.0
C. 2.0
D. 2.5

Question 28:

• WAEC 2020

If log 5(\(\frac{125x^3}{\sqrt[ 3 ] {y}}\) is expressed in the values of p, q and k respectively.

A. 3, \(\frac{-1}{3}\), 5
B. \(\frac{-1}{3}\), 3, 5
C. 3, \(\frac{-1}{3}\), 3
D. 3, \(\frac{-1}{3}\), 3

Question 29:

• WAEC 2020

Consider the statements:
x: Birds fly
y: The sky is blue
Which of the following statements can be represented as x \(\to\) y?

A. When birds fly, the sky is blue
B. Birds fly if and only if the sky is blue?
C. Either the bird is flying or the sky is blue.
D. When the sky is blue, the bird flies.

Question 30:

• WAEC 2020

A binary operation * is defined on the set of real number, R, by x*y = x\(^2\) - y\(^2\) + xy, where x, \(\in\) R. Evaluate (\(\sqrt{3}\))*(\(\sqrt{2}\))

\({\color{red}2x} \times 3\)

A. 1 - \(\sqrt{6}\)
B. \(\sqrt{6}\) - 1
C. \(\sqrt{6}\)
D. 1 + \(\sqrt{6}\)