Waec Further Mathematics 2020 Past Questions and Answers

Question 36:

• WAEC 2020

Simplify; $\frac{\sqrt{5}+3}{4-\sqrt{10}}$

A. $\frac{2}{3}$$\sqrt{5}$ + $\frac{5}{6}\sqrt{2}$ + 2
B. $\frac{2}{3}$$\sqrt{5}$ + $\frac{5}{6}\sqrt{2}$ + $\frac{1}{2}\sqrt{10}$
C. $\frac{2}{3}$$\sqrt{5}$ + $\frac{5}{6}\sqrt{2}$ + $\frac{1}{2}\sqrt{10}$ + 2
D. $\frac{2}{3}$$\sqrt{5}$ - $\frac{5}{6}\sqrt{2}$ + $\frac{1}{2}\sqrt{10}$ + 2

Question 37:

• WAEC 2020

If $\frac{6x+k}{2x^2+7x-15}$ = $\frac{4}{x+5}-\frac{2}{2x-3}$. Find the value of k.

A. - 21
B. - 22
C. - 24
D. - 25

Question 38:

• WAEC 2020

Differentiate $\frac{x}{x+1}$ with respect to x.

A. $\frac{x}{x+1}$
B. $\frac{-1}{x+1}$
C. $\frac{1-x}{(x+1{)}^2}$
D. $\frac{1}{(x+1{)}^2}$

Question 39:

• WAEC 2020

Given that 2x + 3y - 10 and 3x = 2y - 11, calculate the value of (x - y).

A. 5
B. 3
C. - 3
D. - 5

Question 40:

• WAEC 2020

Given that X : R $\to$ R is defined by x = $\frac{y+1}{5-y}$ , y $\in$ R, find the domain of x.

A. {y : y $\in$ R, y $\ne$ 0}
B. {y : y $\in$ R, y $\ne$ 1}
C. {y : y $\in$ R, y $\ne$ 5}
D. {y : y $\in$ R, y $\ne$ 7}