find the value of :
1. (1/2)^-2 + (1/3)^-2 +(1/4)^-2
2. [(-2/3)^-2]^2
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Answer:
1. (1/2)^-2 + (1/3)^-2 +(1/4)^-2
= 4 + 9 + 16 = 13 + 16 = 29
2. [(-2/3)^-2]^2
= 2.25 * 2.25 = 5.0625
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