化简:(1/√2+√4)+(1/√4+√6)+……+(1/(√2n-2)+(√2n))(n为正整数,且n≠2)
问题描述:
化简:(1/√2+√4)+(1/√4+√6)+……+(1/(√2n-2)+(√2n))(n为正整数,且n≠2)
RT,化简:(1/√2+√4)+(1/√4+√6)+……+(1/(√2n-2)+(√2n))(n为正整数,且n≠2)
坐等.
答
(1/√2+√4)+(1/√4+√6)+……+(1/(√2n-2)+(√2n))=(√2-√4)/[(√2+√4)(√2-√4)]+(√4-√6)/[(√4+√6)(√4-√6)]+……+(√2n-2-√2n)/[(√2n-2+√2n)(√2n-2-√2n)]=(√2-√4)/(-2)+(√4-√6)/(-2)+……+(√2...