计算:1/(1+根号2)+1/(根号2+根号3)+1/(根号3+根号4)+…+1/(根号99+根号100)
问题描述:
计算:1/(1+根号2)+1/(根号2+根号3)+1/(根号3+根号4)+…+1/(根号99+根号100)
答
1/(1+根号2)+1/(根号2+根号3)+1/(根号3+根号4)+…+1/(根号99+根号100)
=(√2-1)/(√2+1)(√2-1)+.+(√100-√99)/(√100-√99)(√100+√99)
=√2-1+√3-√2+...+√100-√99
=√100-1
=10-1
=9;
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