( x+1 / x )^2 = x^2+1 / x^2+2 這是怎麼導出來的?
回答 (1)
2017-10-01 7:17 pm
Sol
(x+1/x_^2
=x^2+2*x*(1/x)+)1/x^2
=x^2+2+1/x^2
=x^2+1/x^2+2
(x+1/x_^2
=x^2+2*x*(1/x)+)1/x^2
=x^2+2+1/x^2
=x^2+1/x^2+2
收錄日期: 2021-04-30 22:30:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170927110428AAPilKw