已知a
问题描述:
已知a
数学人气:195 ℃时间:2020-05-13 00:47:18
优质解答
=√(a²+2+1/a²)
=√(a+1/a)²
=|a+1/a|
∵a∴a+1/a∴原式=-a-1/a
=√(a+1/a)²
=|a+1/a|
∵a∴a+1/a∴原式=-a-1/a
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答
=√(a²+2+1/a²)
=√(a+1/a)²
=|a+1/a|
∵a∴a+1/a∴原式=-a-1/a