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Question
Find the value of `(1/2)^(-2)+(1/3)^(-2)+(1/4)^(-2)`
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Solution
`(1/2)^(-2)+(1/3)^(-2)+(1/4)^(-2)`
= `(2/1)^(2)+(3/1)^(2)+(4/1)^(2)` `(thereforea^(-m)=1/a^m)`
= 22 + 32 + 42
= 4 + 9 + 16
= 29
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| Powers Table | ||||||||||
| x | 1x | 2x | 3x | 4x | 5x | 6x | 7x | 8x | 9x | 10x |
| 1 | 1 | 2 | ||||||||
| 2 | 1 | 4 | ||||||||
| 3 | 1 | 8 | ||||||||
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| 6 | 1 | 64 | ||||||||
| 7 | 1 | 128 | ||||||||
| 8 | 1 | 256 | ||||||||
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