GWD数学11 Q29

haoye12321

What is the remainder when the positive integer n is divided by the positive integer k, where k > 1?
(1)n = (k+1)3
(2)k = 5

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案：A.
为什么？谢谢~

angelsgx

把 (k+1)^3展开就知道了

Fuckitup

(k+1)^3除以k得k^2+3k+k+1/k，因为k>1, 所以余数是1？