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should i argue with her, or is this just wrong.
i got 0 credit for it, instructions of the test were:
"fore each of the follwoing, determine wheter the infinite series converges or diverges. if it is an alternating series, determine whether it coverges conditionally or absolutely.
she wrote on the test "geometric series converges" which i see works but how about this:
http://i176.photobucket.com/albums/w...ntitled4-1.jpg
is that mathmatically wrong somewhere?
Yes it's wrong. Your teacher is quite correct to give you zero credit for this solution. It shows a fundamental lack of understanding of series algebra.Quote:
Originally Posted by Legendsn3verdie
The result of the nth root test is 2/5, NOT 5*(2/5).
Once you take the 5 out of the summation, youris
.
Once the 5 is taken out, all it does is multiply with the value that the series converges to.
The n-th root of the n-th term isQuote:
Originally Posted by Legendsn3verdie
not
Alternativly you should be applying the n-th root test to the series^n)
CB
hm yah ok i guess i was completly wrong thanks for helpin me understand my error.