What is the integral from 1 to infinity of 21(e-sqrt(x))/(sqrt(x)) ?

The integral from 1 to infinity of 21(e-sqrt(x))/(sqrt(x)) is diverges

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integral from 1 to infinity of 21(e-sqrt(x))/(sqrt(x))

\int_{1}^{\infty} 21 \frac{e - x}{x} d x

diverges

Solution steps

\int_{1}^{\infty} 21 \cdot \frac{e - x}{x} d x

Compute the indefinite integral:

\int 21 \cdot \frac{e - x}{x} d x = 21 (2 e x - x) + C

Compute the boundaries:

\int_{1}^{\infty} 21 \cdot \frac{e - x}{x} d x =

diverges

= diverges

\int - 3 ln (2 x + 1) d x

7 e^{x} arctan (x)

t^{2} y^{^{''}} - 2 t y^{^{'}} - 4 y = 0

\int (5 x - 4)^{3} d x

\frac{d}{d x} (\frac{\frac{d}{d x} ( 2 )}{x})

What is the integral from 1 to infinity of 21(e-sqrt(x))/(sqrt(x)) ?
The integral from 1 to infinity of 21(e-sqrt(x))/(sqrt(x)) is diverges