[問題]GWD 11 Q13

[sugarcane]

Q13. Which of the following is equal to 2^12-2^6/2^6-2^3?

A.2^6+2^3
B.2^6-2^3
C.2^9
D.2^3
E.2

我算來算去都是B耶
誰可以幫幫我
話簡給我看一下
我算到
2^6(2^6-1)/2^3(2^3-1)
就卡住了

[huacy]

分子部份的 (2^6-1) = (2^3-1)*(2^3+1)