The slope of the tangent to the curve $y=\int_0^x \frac{1}{1+t^3} d t$ at the point, where $x=1$ is

The slope of the tangent to the curve $y=\int_0^x \frac{1}{1+t^3} d t$ at the point, where $x=1$ is
  1. $\frac{1}{4}$
  2. $\frac{1}{3}$
  3. $\frac{1}{2}$
  4. $1$

Solution

We have, $y=\int_0^x \frac{1}{1+t^3} d t$ Differentiating w.r.t. $x$, we get $\frac{d y}{d x}=\frac{1}{1+x^3}$ $\begin{aligned} & \text { At } x=1 \\ & \therefore \quad\left(\frac{d y}{d x}\right)_{x=1}=\frac{1}{1+1}=\frac{1}{2} \end{aligned}$

Asked in: AP EAMCET 2015

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