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Evaluate:`int(e^x)/(e^(2x)+6e^x+5)dx` |
Answer» Correct Answer - `(1)/(4)"log"|(e^(x)+1)/(e^(x)+5)|+C` `I=int(e^(x))/(e^(2x)+6e^(x)+5)dx=int(e^(x))/((e^(x))^(2)+6e^(x)+5)dx` ` "Let "e^(x)=t " or " e^(x)dx=dt` ` :. I=int(dt)/(t^(2)+6t+5)` `=int(1)/((t+3)^(2)-2^(2))dt` `=(1)/(2xx2)"log"|(t+3-2)/(t+3+2)|+C=(1)/(4)"log"|(e^(x)+1)/(e^(x)+5)|+C` |
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