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Ex 12.1, 6 (i) - Chapter 12 Class 8 Exponents and Powers

Last updated at Sept. 9, 2021 by

Ex 12.1, 6 - Evaluate (i) {(1/3)^-1 - (1/4)^-1}^-1 (ii) (5/8)^-7

Ex 12.1, 6 - Chapter 12 Class 8 Exponents and Powers - Part 2

 

 

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Transcript

Ex 12.1, 6 Evaluate (i) {(1/3)^(−1)−(1/4)^(−1) }^(−1) {(1/3)^(−1)−(1/4)^(−1) }^(−1) = {1^(−1)/3^(−1) − 1^(−1)/4^(−1) }^(−1) = {1/3^(−1) − 1/4^(−1) }^(−1) = (3^1−4^1 )^(−1) = (3−4)^(−1) = (−1)^(−1) (𝑈𝑠𝑖𝑛𝑔 (𝑎/𝑏)^𝑚=𝑎^𝑚/𝑏^𝑚 ) (1 to the power any number is 1) = 1/(−1)^1 = 1/(−1) = −𝟏

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