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1³+2³+3³+…+n³=.

A.1                                                                  B.1+

C.1++                                                      D.1+++

A.1+2                                                             B.1+2+2²

C.1+2+2²+2³                                                 D.1+2+2²+2³+2⁴

A.命題對(duì)所有正整數(shù)都成立

B.命題對(duì)小于n₀的正整數(shù)不成立，對(duì)大于或等于n₀的正整數(shù)都成立

C.命題對(duì)小于n₀的正整數(shù)成立與否不能確定，對(duì)大于或等于n₀的正整數(shù)都成立

D.以上說(shuō)法都不正確

A.假設(shè)n=k（k∈N^*）時(shí)命題成立

B.假設(shè)n≤k（k∈N^*）時(shí)命題成立

C.假設(shè)n=2k+1（k∈N^*）時(shí)命題成立

D.假設(shè)n=2k－1（k∈N^*）時(shí)命題成立

A.p（n）對(duì)所有正整數(shù)n都成立

B.p（n）對(duì)所有正偶數(shù)n都成立

C.p（n）對(duì)所有正奇數(shù)n都成立

D.p（n）對(duì)所有自然數(shù)n都成立

A.1+2+2²+…+2^k－2+2^k－1=2^k+1－1

B.1+2+2²+…+2^k+2^k+1=2^k－1+2^k+1

C.1+2+2²+…+2^k－1+2^k+1=2^k+1－1

D.1+2+2²+…+2^k－1+2^k=2^k－1+2^k

A.2                                                                 B.3

C.4                                                                 D.5