Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Hi, If you try to group the terms then you will see the solution. [(-1)^m]*[(-1)^n+(1)]+[(-1)^n]
From A we know that m is odd so the sign will be neg. So no matter what the sign of n is the ans is -1. from b we know that n is odd which means that the sign is neg. The term in the  is 0, and the ans is -1.
Check out this awesome article about Anderson on Poets Quants, http://poetsandquants.com/2015/01/02/uclas-anderson-school-morphs-into-a-friendly-tech-hub/ . Anderson is a great place! Sorry for the lack of updates recently. I...