# Ex 12.1, 3 (iii) - Chapter 12 Class 8 Exponents and Powers

Last updated at Sept. 9, 2021 by Teachoo

Last updated at Sept. 9, 2021 by Teachoo

Transcript

Ex 12.1, 3 Find the value of. (iii) (1/2)^(−2)+ (1/3)^(−2)+ (1/4)^(−2) (1/2)^(−2)+ (1/3)^(−2)+ (1/4)^(−2) = 1^(−2)/2^(−2) + 1^(−2)/3^(−2) + 1^(−2)/4^(−2) = 1/2^(−2) + 1/3^(−2) + 1/4^(−2) = 2^2 + 3^2 + 4^2 = 4 + 9 + 16 = 29 (1 to the power any number is 1)

Ex 12.1

Ex 12.1, 1 (i)
Important

Ex 12.1, 1 (ii)

Ex 12.1, 1 (iii)

Ex 12.1, 2 (i) Important

Ex 12.1, 2 (ii)

Ex 12.1, 2 (iii)

Ex 12.1, 2 (iv)

Ex 12.1, 2 (v)

Ex 12.1, 3 (i) Important

Ex 12.1, 3 (ii)

Ex 12.1, 3 (iii) You are here

Ex 12.1, 3 (iv)

Ex 12.1, 3 (v)

Ex 12.1, 4 (i)

Ex 12.1, 4 (ii)

Ex 12.1, 5

Ex 12.1, 6 (i)

Ex 12.1, 6 (ii)

Ex 12.1, 7 (i) Important

Ex 12.1, 7 (ii)

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