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int(x^4-1)/(x^2sqrt(x^4+x^2+1))dx= sqr...

`int(x^4-1)/(x^2sqrt(x^4+x^2+1))dx=` `sqrt(x^2+1/(x^2)+1)+C` `(sqrt(x^4+x^2+1))/(x^2)+C` `(sqrt(x^4+x^2+1))/x+C` (d) none of these

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int(x^4-1)/(x^2sqrt(x^4+x^2+1))dx= (a) sqrt(x^2+1/(x^2)+1)+C (b) (sqrt(x^4+x^2+1))/(x^2)+C (c) (sqrt(x^4+x^2+1))/x+C (d) none of these

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