1.

`int(dx)/(9x^(2) +1)`A. ` (1)/(3) tan^(-1) (2x) + c`B. `(1)/(3) tan^(-1) x + c `C. `(1)/(3) tan^(-1) (3x) + c`D. `(1)/(3) tan^(-1) (6x) + c `

Answer» Correct Answer - c
`(1)/(3) tan^(-1) (3x) + c `


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