(5x^2-15x^2+5)/3x^2=0求x^2/(x^4+x^2+1)
1个回答
(5x^2-15x^2+5)/3x^2=0
因为分母不能为0,
所以,(5x^2-15x^2+5)=0
x^2=1/2
x^2/(x^4+x^2+1)
=1/2÷(1/4+1/2+1)
=2/7
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