If you're experiencing a roadblock with one of the Manhattan Prep GMAT math strategy guides, help is here!
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Joined: Sat Jul 30, 2016 3:03 am

guide 2, ch 4, question 8

by NabeelZ316 Sat Aug 06, 2016 2:38 pm

If 4^a +4^a+1 = 4^a+2 - 176 , what is the value of a?

here is what im confused about with the solution provided.

For the right side of the equation, after simplifying we get one part as -4^a - 4^a . Understood, but then this further turns into 4^0
How did it get to 4^0??

if we take 4^a as common, then should leave 1-1 which is 0 which then multiplies by 4^0 to give us ZERO. But in the solution, it is 1.
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Re: guide 2, ch 4, question 8

by RonPurewal Tue Aug 09, 2016 8:05 am

please reproduce the relevant part of the answer key. thank you. (if it's in a physical book, just take a picture of it and post a link to the picture.)