若a+1/a=2,则a^2+1/a^2=? A.2 B.4 C.0 D.-若a+1/a=2,则a^2+1/a^2=?A.2 B.4 C.0 D.-4跪求解法谢谢啊
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![若a+1/a=2,则a^2+1/a^2=? A.2 B.4 C.0 D.-若a+1/a=2,则a^2+1/a^2=?A.2 B.4 C.0 D.-4跪求解法谢谢啊](/uploads/image/z/8592201-9-1.jpg?t=%E8%8B%A5a%2B1%2Fa%3D2%2C%E5%88%99a%5E2%2B1%2Fa%5E2%3D%3F+A.2+B.4+C.0+D.-%E8%8B%A5a%2B1%2Fa%3D2%2C%E5%88%99a%5E2%2B1%2Fa%5E2%3D%3FA.2+++++B.4+++++C.0+++++D.-4%E8%B7%AA%E6%B1%82%E8%A7%A3%E6%B3%95%E8%B0%A2%E8%B0%A2%E5%95%8A)
若a+1/a=2,则a^2+1/a^2=? A.2 B.4 C.0 D.-若a+1/a=2,则a^2+1/a^2=?A.2 B.4 C.0 D.-4跪求解法谢谢啊
若a+1/a=2,则a^2+1/a^2=? A.2 B.4 C.0 D.-
若a+1/a=2,则a^2+1/a^2=?
A.2 B.4 C.0 D.-4
跪求解法谢谢啊
若a+1/a=2,则a^2+1/a^2=? A.2 B.4 C.0 D.-若a+1/a=2,则a^2+1/a^2=?A.2 B.4 C.0 D.-4跪求解法谢谢啊
将左式平方一下你就懂了
^是什么意思