Answer:
In this case, if you sum the first seven terms of your sum, you get 0.0002, that means that your error is less than 0.00002 , in other words, if you sum 6 terms of your sum, 4 terms of your result are correct, (because the error is less than 0.00002).
Step-by-step explanation:
Remember what the alternating series theorem says, basically it states that for a convergent alternating series .
The error of the series can be estimated as follows

The meaning of the theorem is that
is an upper bound of the n-error of your sum.
In this case, if you sum the first seven terms of your sum, you get 0.0002, that means that your error is less than 0.00002 , in other words, if you sum 6 terms of your sum, 4 terms of your result are correct, (because the error is less than 0.00002).