Question and Answers Forum

All Questions      Topic List

Integration Questions

Previous in All Question      Next in All Question      

Previous in Integration      Next in Integration      

Question Number 92410 by mathmax by abdo last updated on 06/May/20

find ∫_1 ^(√2)     (dx/((√(1+3x))−(√(1−3x))))

$${find}\:\int_{\mathrm{1}} ^{\sqrt{\mathrm{2}}} \:\:\:\:\frac{{dx}}{\sqrt{\mathrm{1}+\mathrm{3}{x}}−\sqrt{\mathrm{1}−\mathrm{3}{x}}} \\ $$

Commented by Prithwish Sen 1 last updated on 06/May/20

1−3x≥0  ⇒x≤(1/3)  and 1+3x≥0⇒x≥−(1/3)  ∴ the integral does not exist in the given interval.  In the interval −(1/3)≤x≤(1/3)  the function has only  finite number of removable discontinuity.

$$\mathrm{1}−\mathrm{3x}\geqslant\mathrm{0}\:\:\Rightarrow\mathrm{x}\leqslant\frac{\mathrm{1}}{\mathrm{3}}\:\:\mathrm{and}\:\mathrm{1}+\mathrm{3x}\geqslant\mathrm{0}\Rightarrow\mathrm{x}\geqslant−\frac{\mathrm{1}}{\mathrm{3}} \\ $$$$\therefore\:\mathrm{the}\:\mathrm{integral}\:\mathrm{does}\:\mathrm{not}\:\mathrm{exist}\:\mathrm{in}\:\mathrm{the}\:\mathrm{given}\:\mathrm{interval}. \\ $$$$\mathrm{In}\:\mathrm{the}\:\mathrm{interval}\:−\frac{\mathrm{1}}{\mathrm{3}}\leqslant\mathrm{x}\leqslant\frac{\mathrm{1}}{\mathrm{3}}\:\:\mathrm{the}\:\mathrm{function}\:\mathrm{has}\:\mathrm{only} \\ $$$$\mathrm{finite}\:\mathrm{number}\:\mathrm{of}\:\mathrm{removable}\:\mathrm{discontinuity}. \\ $$

Commented by Prithwish Sen 1 last updated on 06/May/20

sir I think the problem will be  ∫_(−(1/3)) ^(1/3) (dx/((√(1+3x))−(√(1−3x))))

$$\mathrm{sir}\:\mathrm{I}\:\mathrm{think}\:\mathrm{the}\:\mathrm{problem}\:\mathrm{will}\:\mathrm{be} \\ $$$$\int_{−\frac{\mathrm{1}}{\mathrm{3}}} ^{\frac{\mathrm{1}}{\mathrm{3}}} \frac{\mathrm{dx}}{\sqrt{\mathrm{1}+\mathrm{3x}}−\sqrt{\mathrm{1}−\mathrm{3x}}} \\ $$

Commented by mathmax by abdo last updated on 07/May/20

also this integral is divergent due to 0

$${also}\:{this}\:{integral}\:{is}\:{divergent}\:{due}\:{to}\:\mathrm{0} \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com