問題詳情:
用數學歸納法*當n∈N*時1+2+22+23+…+25n-1是31的倍數時,當n=1時原式為________,從k→k+1時需增添的項是____________.
【回答】
1+2+22+23+24 25k+25k+1+25k+2+25k+3+25k+4
知識點:推理與*
題型:填空題