Question

用數(shù)學(xué)歸納法證明3^k≥n³(n≥3,n∈N)第一步應(yīng)驗證(    )

A.n=1                          B.n=2                   C.n=3                          D.n=4

Answer 1

C

解析:

由題意知n≥3，∴應(yīng)驗證n=3.

答案：C