谁能解答此题(含步骤):1x2x3x4⼀1+2x3x4x5⼀1+3x4x5x6⼀1+......+n74(n+1)74 (n+2)74 (n+3)⼀1

2024-12-20 11:35:51
推荐回答(2个)
回答1:

n�7�4(n+1)�7�4 (n+2)�7�4 (n+3)/1
???
是n�7�4(n+1)�7�4 (n+2)�7�4 (n+3)是分母还是分子哦

回答2:

是1/5