1.

int sqrt(x^(2)-8x+7)dx=....

Answer»

`(1)/(2)(x-4) sqrt(x^(2)-8x+7)+9log|x-4+sqrt(x^(2)-8x+7)|+c`
`(1)/(2)(x+4) sqrt(x^(2)-8x+7)+9log|x+4+sqrt(x^(2)-8x+7)|+c`
`(1)/(2)(x-4) sqrt(x^(2)-8x+7)-3sqrt(2) LOG x+4+sqrt(x^(2)-8x+7)|+c`
`(1)/(2)(x+4) sqrt(x^(2)-8x+7)+(9)/(2)log|x-4+sqrt(x^(2)-8x+7)|+c`

Answer :D


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