1.

(d)/(dx){log(x+sqrt(a^2+x^2))} =

Answer»

`1/(X+SQRT(a^2+x^2))`
`x/(sqrt(a^2+x^2))`
`1/(x(x+sqrt(a^2+x^2)))`
`1/sqrt(a^2+x^2)`

ANSWER :D


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