By math induction,prove that 1*5+2*6+3*7+...+n(n+4)=n(n+1)(2n+13)/6 for all positive integers n.
By math induction,prove that 1*3+3*5+5*7+...+(2n-1)(2n+1)=(2n+3)(2n+1)(2n-1)+3/6 for all positive integers n.
F4 A.maths induction 急急急！！
2011-05-16 2:59 am
回答 (1)
2011-05-16 3:28 am
收錄日期: 2021-04-23 20:45:43
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