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Evaluate `int(dx)/(1-x-x^(2))` |
Answer» Correct Answer - ` -(1)/(sqrt(5))log_(e)|(2x+1-sqrt(5))/(2x+1+sqrt(5))|+C` `I= -int(dx)/(x^(2)+x-1)= -int(dx)/((x+(1)/(2))^(2)-(5)/(4))` `=-(1)/(2*(sqrt(5))/(2))"log"_(e)|((x+(1)/(2))-(sqrt(5))/(2))/((x+(1)/(2))+(sqrt(5))/(2))|+C` `= -(1)/(sqrt(5))log_(e)|(2x+1-sqrt(5))/(2x+1+sqrt(5))|+C` |
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