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Evaluate : sum(i=1)^(10){(1/2)^(j-1)+(1/...

Evaluate : `sum_(i=1)^(10){(1/2)^(j-1)+(1/5)^(j+1)}`

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The correct Answer is:
`=1(1-1/(2^(10)))+1/20(1-1/(5^(10)))`
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