d x 9 x^2+1 = . - Vidyadip

MCQ

$\int \frac{d x}{9 x^2+1}=\ldots \ldots .$

A
$\frac{1}{3} \tan ^{-1}(2 x)+ c$
B
$\frac{1}{3} \tan ^{-1} x+c$
C
$\frac{1}{3} \tan ^{-1}(3 x)+c$
D
$\frac{1}{3} \tan ^{-1}(6 x)+c$

✓

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