√(x²+1/x²-2)化简
问题描述:
√(x²+1/x²-2)化简
答
√(x²+1/x²-2)
=√(x-1/x)²
=|x-1/x|
√(x²+1/x²-2)化简
√(x²+1/x²-2)
=√(x-1/x)²
=|x-1/x|