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Evaluate:`int1/(sqrt(x)+x)dx`A. `log|1+sqrt(x)|+C`B. `2log|1+sqrt(x)|+C`C. `(1)/(sqrtx)tan^(-1)sqrt(x)+C`D. none of these |
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Answer» Correct Answer - B `I=int(dx)/(sqrt(x)(1+sqrt(x)))*"Put"(1+sqrtx)=t and(1)/(2sqrt(x))dx=dt`. `:." "I=2*int(1)/(t)dt=2log|t|+C`. |
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