(2011台湾台北,2)计算(-3)3+52-(-2)2之值为何?
A.2
B.5
C.-3
D.-6
D
(-3)3+52-(-2)2=-27+25-4=-6,故选D
已知数列{an},那么“对于任意的n∈N*,点Pn(n,an)都在直线y=3x+1上”是“数列{an}为等差数列”的( )
A.充分不必要条件
B.必要不充分条件
C.充要条件
D.既不充分也不必要条件
She and her husband have different views on many issues.