Question

If there's (.........) after a maths problem then it means the problem tends to infinity, this is a way to show Infinite series, the problem never ends.

Find n for the second time, and tell you twice that n is an Infinite series.

Don't Spam.​

Answer 1

Answer:

n=1-2+3-4+5-6+7-8+9

=(1-2)+(3-4)+(5-6)+(7-8)+9

=(-1)+(-1)+(-1)+(-1)+9

=(-4)+9

=5