ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 246:

• JAMB 1989

Express \(\frac{1}{x + 1}\) - \(\frac{1}{x - 2}\) as a single algebraic fraction

A. \(\frac{-3}{(x + 1)(2 - x)}\)
B. \(\frac{3}{(x + 1)(2 - x)}\)
C. \(\frac{-1}{(x + 1)}\)
D. \(\frac{1}{(x + 1)(x - 2)}\)

Question 247:

• JAMB 1989

Simplify \(\frac{x(x + 1)^{\frac{1}{2}} - (x + 1)^{\frac{1}{2}}}{(x + 1)^{\frac{1}{2}}}\)

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

Question 248:

• JAMB 1989

The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is

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

Question 249:

• JAMB 1989

If -8, m, n, 19 are in arithmetic progression, find (m, n)

A. 1, 10
B. 2, 10
C. 3, 13
D. 4, 16

Question 250:

• JAMB 1990

The H.C.F. of a²bx + ab²x and a²b - b² is

A. B
B. A + b
C. B(a \(\div\) b)
D. Abx(a² - b²)