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Question

 $$ \int e^x \left( \frac{2x + 1}{2\sqrt{x}} \right) dx = $$

The correct answer is

 ex√x + C

To solve the integral \(\int e^x \left(\frac{2x + 1}{2\sqrt{x}}\right) \, dx\), we'll use integration by parts, which is a method for integrating products of functions. The formula for integration by parts is given by:

\(\int u \, dv = uv - \int v \, du\)

Let's choose:

  • \(u = \frac{2x + 1}{2\sqrt{x}}\)
  • \(dv = e^x \, dx\)

\(u = \frac{2x + 1}{2x^{1/2}} = x^{1/2} + \frac{1}{2}x^{-1/2}\)

Differentiate using the power rule:

\(du = \left(\frac{1}{2}x^{-1/2} - \frac{1}{4}x^{-3/2}\right) \, dx\)

\(v = e^x\)

Use the integration by parts formula:

\(\int u \, dv = uv - \int v \, du\)

\(=\left(\frac{2x + 1}{2\sqrt{x}}\right)e^x - \int e^x \left(\frac{1}{2x^{1/2}} - \frac{1}{4x^{3/2}}\right) \, dx\)

Now compute the integral:

\(\int e^x \left(\frac{1}{2x^{1/2}}\right) \, dx =  e^x √x + C\)

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Important Questions from Integrals

  1. \( \int_{0}^{\frac{\pi}{2}} \frac{1 - \cot x}{\cosec x + \cos x} dx = \)

  2. The value of the integral \( \int_{\log_e 2}^{\log_e 3} \frac{e^{2x}- 1}{e^{2x} + 1} dx \)   is :

  3. \(\displaystyle \int \frac{\pi}{x^{n+1} - x} dx\)

  4. \(\int_{2}^{3} |2x - 1| \,dx =\)

  5. \(\int \frac{dx}{x^a} =\)

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