Indices - Jamb Mathematics Past Questions and Answers

Question 26:

• JAMB 1986

If \(5^{(x + 2y)} = 5\) and \(4^{(x + 3y)} = 16\), find \(3^{(x + y)}\).

A. 7
B. 1
C. 3
D. 27

Question 27:

• JAMB 1988

Evaluate \(\frac{8^{\frac{1}{3}} \times 5^{\frac{2}{3}}}{10^{\frac{2}{3}}}\) = \(\frac{8^{\frac{1}{3}} \times 5^{\frac{2}{3}}}{10^{\frac{2}{3}}}\)

A. \(\frac{2}{5}\)
B. \(\frac{5}{3}\)
C. 3\(\sqrt{5}\)
D. 3\(\sqrt{2}\)

Question 28:

• JAMB 1989

Simplify \(\sqrt[3]{(64r^{-6})^{\frac{1}{2}}}\)

A. \(\frac{r}{2}\)
B. 2r
C. \(\frac{1}{2r}\)
D. \(\frac{2}{r}\)

Question 29:

• JAMB 1989

What are the values of y which satisfy the equation \(9^{y} - 4 \times 3^{y} + 3 = 0\) ?

A. -1 and 0
B. -1 and 1
C. 1 and 3
D. 0 and 1

Question 30:

• JAMB 1989

Solve for a positive number x such that \(2^{(x^3 - x^2 - 2x)} = 1\)

A. 4
B. 3
C. 2
D. 1