Q94 of 196 Page 249

Express andas powers of a rational number.

we know that , 27 = 3 × 3 × 3 = 33


And , -27 = -3 × -3 × -3 = (-3)3


And , 64 = 4 × 4 × 4 = 43


∴ = =


∴ = = …..(by laws of exponents ie. = )


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Express 3–5 × 3–4 as a power of 3 with positive exponent.

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Express and as powers of a rational number.

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Express as a power of a rational number with negative exponent.