21/Jan Math RECALL-Best gmat prep 2022(4)

WHAT IS RECALL?

RECALL is real exam questions according to latest examinee’s recall (REQALER).

There is a 1+2+2²+2 cube ➕ …➕ 2 to the nth power that I have a deep impression on that I did not calculate; ask if n=9, what does this formula equal to

The options are 2 to the fifth power ➕ 1 times 2 to the fifth power -1; and 2 to the fifth power ➕ 1 to the square