यदि \( \int \frac{\log \left(x+\sqrt{1+x^{2}}\right)}{\sqrt{1+x^{2}}} d x=g \circ f(x)+ \) अचर, ...
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0यदि \( \int \frac{\log \left(x+\sqrt{1+x^{2}}\right)}{\sqrt{1+x^{2}}} d x=g \circ f(x)+ \) अचर, तब
(A) \( f(x)=\log \left(x+\sqrt{x^{2}+1}\right) \)
(B) \( f(x)=\log \left(x+\sqrt{\left.x^{2}+1\right)}\right. \) तथा \( g(x)=x^{2} \)
(C) \( f(x)=\log \left(x+\sqrt{\left.x^{2}+1\right)}\right. \) तथा \( g(x)=\frac{x^{2}}{2} \)
(D) \( f(x)=\frac{x^{2}}{2} \) तथा \( g(x)=\log \left(x+\sqrt{x^{2}+1}\right) \)
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