- #1

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## Homework Statement

find the sum of (-1)^(n-1)*(n^2)/(10^n) correct to 4 decimal places

## Homework Equations

## The Attempt at a Solution

I got s5 since s6 is 36/1000000<0.0001

According to Wolframalpha, s5 is 0.06765 and s6 is 0.067614. Am i missing something here, or reading the problem wrong? The book claims it's s6 since s7 is 0.0000049 and that is the first value accurate to the 4th decimal place