怎么算2[√(4k^4+7k^2+3)]/(k^2+1) =2√[(4k^2++3)/(k^2+1)]
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怎么算2[√(4k^4+7k^2+3)]/(k^2+1) =2√[(4k^2++3)/(k^2+1)]
怎么算2[√(4k^4+7k^2+3)]/(k^2+1) =2√[(4k^2++3)/(k^2+1)]
怎么算2[√(4k^4+7k^2+3)]/(k^2+1) =2√[(4k^2++3)/(k^2+1)]
2[√(4k^4+7k^2+3)]/(k^2+1)
=2[√(4k^2+3)(K^2+1)]/(k^2+1)
=2[√(4k^2+3)(K^2+1)]/[√(k^2+1) (k^2+1) ]
=2√[(4k^2+3)(K^2+1)/(k^2+1) (k^2+1)]
=2√[(4k^2+3/ (k^2+1)]
怎么算2[√(4k^4+7k^2+3)]/(k^2+1) =2√[(4k^2++3)/(k^2+1)]
(4k^2+7k)+(-k^2+3k-1)
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