赞 boy1998_2002 幼苗
共回答了14个问题采纳率：100% 举报
e^2=[a^2+(a+1)^2]/a^2
=1 + (a^2+2a+1)/a^2
=1 + (1+2/a +1/a^2)
=1 + (1/a^2 +2/a +1)
=1+(1/a+1)^2
=1 + (a^2+2a+1)/a^2
=1 + (1+2/a +1/a^2)
=1 + (1/a^2 +2/a +1)
=1+(1/a+1)^2
1年前
1
你能帮帮他们吗