3^-2 can be written as
(a) 3²
(b) 1/3²
(c) 1/3^-2
(d) -2/3

Solution:

The Correct answer is (b)

Using the law of exponents we have a-m = 1/am

We can say that 3-2 = 1/32

✦ Try This: 32 × 4 can be expressed as (a) 122, (b) 3 × 2 × 4, (c) (3 × 2)2, (d) 4 / 32

The Correct answer is (C)

Given, 32 × 4 = 32 × 22

Using the law of exponents (a)m(b)m = (ab)m

32 × 22 = (3 × 2)2

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 12

NCERT Exemplar Class 8 Maths Chapter 8 Problem 3

3^-2 can be written as (a) 3², (b) 1/3², (c) 1/3^-2, (d) -2/3

Summary:

3^-2 can be written as 1/3²

☛ Related Questions:

• The value of 1/4-2 is (a) 16, (b) 8, (c) 1/16, (d) 1/8
• The value of 35 ÷ 3-6 is (a) 35, (b) 3-6, (c) 311, (d) 3-11
• The value of (2/5)-2 is (a) 4/5, (b) 4/25, (c) 25/4, (d) 5/2