What is the integral from 0 to 4 of 1/(1-x) ?

The integral from 0 to 4 of 1/(1-x) is diverges

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integral from 0 to 4 of 1/(1-x)

\int_{0}^{4} \frac{1}{1 - x} d x

diverges

Solution steps

\int_{0}^{4} \frac{1}{1 - x} d x

Find undefined (singularity) points:

x = 1

If exist

b, a < b < c, f (b) =

undefined

, \int_{a}^{c} f (x) d x = \int_{a}^{b} f (x) d x + \int_{b}^{c} f (x) d x

= \int_{0}^{1} \frac{1}{1 - x} d x + \int_{1}^{4} \frac{1}{1 - x} d x

\int_{0}^{1} \frac{1}{1 - x} d x =

diverges

If part of the expression diverges, then entire expression diverges

= diverges

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\int_{0}^{\infty} 2^{x} d x

What is the integral from 0 to 4 of 1/(1-x) ?
The integral from 0 to 4 of 1/(1-x) is diverges