Q. 96 B4.3( 3 Votes )

# Express as a power of a rational number with negative exponent.(25 ÷ 28) × 2–7

using laws of exponents ,am × an = a(m+n)

And , am ÷ an = a(m-n)

We have , (25 ÷ 28) = 2(5-8)= 2-3

Now , 2-3 × 2–7= 2(-3)+(-7)= 2-10

(25 ÷ 28) × 2–7= 2-10

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