m加1分之2 加上m方减1分之m加2除以m加一分之m
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发布时间:2024-09-27 04:14
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热心网友
时间:2024-11-17 05:28
{ 2/(m+1) + (m+2)/(m²-1) } ÷ m/(m+1)
= { 2(m-1)/[(m+1) (m-1)]+ (m+2)/[(m+1)(m-1)] } ÷ m/(m+1)
= { (2m-2+m+2)/[(m+1)(m-1)] } ÷ m/(m+1)
= 3m/[(m+1)(m-1)] } * (m+1)/m
= 3/(m-1)