数列{an}满足an+1+(-1)nan=2n-1,则{an}的前60项和为里的一步当n=2k时,a2k+1+a2k=4k-1,当n=2k-1时,a2k-a2k-1=4k-3,a2k+1+a2k-1=2,a2k+1+a2k+3=2,a2k+1+a2k+3=2是怎么来的
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数列{an}满足an+1+(-1)nan=2n-1,则{an}的前60项和为里的一步当n=2k时,a2k+1+a2k=4k-1,当n=2k-1时,a2k-a2k-1=4k-3,a2k+1+a2k-1=2,a2k+1+a2k+3=2,a2k+1+a2k+3=2是怎么来的
数列{an}满足an+1+(-1)nan=2n-1,则{an}的前60项和为里的一步
当n=2k时,a2k+1+a2k=4k-1,
当n=2k-1时,a2k-a2k-1=4k-3,
a2k+1+a2k-1=2,a2k+1+a2k+3=2,
a2k+1+a2k+3=2是怎么来的
数列{an}满足an+1+(-1)nan=2n-1,则{an}的前60项和为里的一步当n=2k时,a2k+1+a2k=4k-1,当n=2k-1时,a2k-a2k-1=4k-3,a2k+1+a2k-1=2,a2k+1+a2k+3=2,a2k+1+a2k+3=2是怎么来的
将k换为k+1即得.
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