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Evaluate : Int 1/Sqrt("X"^2 - 4"X" + 2) "Dx" - Mathematics and Statistics

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Question

Evaluate :  `int 1/sqrt("x"^2 - 4"x" + 2) "dx"`

Sum
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Solution

I =  `int 1/sqrt("x"^2 - 4"x" + 2) "dx"`


`= int  "dx"/sqrt("x"^2 - 4"x" +4 - 2) `


`= int "dx"/sqrt(("x - 2")^2 -( sqrt 2)^2) "dx"`


`= "log" |("x"-2) + sqrt(("x - 2")^2 -( sqrt 2)^2)| + "c"`


`= "log" |("x"-2) + sqrt("x"^2 - 4"x" + 2)| + c`

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2015-2016 (July)

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