d=(Am-Ak)/(m-k)=(A-B)/(m-k)
Am+k=Am+kd
=A+(A-B)/(m-k)
已知数列AN为等差数列 且Am=A Ak=B M不等于K 求Am+k
已知数列AN为等差数列 且Am=A Ak=B M不等于K 求Am+k
A(m+k)
A(m+k)
数学人气:848 ℃时间:2020-03-29 13:34:11
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