1.

The solution of (dy)/(dx) + (y^(2) + y +1)/(x^(2) + x + 1) = 0is

Answer»

`TAN^(-1) (2X + 1) + Tan^(-1) (2y + 1) = c`
`Tan.^(-1) (2x + 1)/(SQRT3) + Tan.^(-1) (2y + 1)/(sqrt3) = c`
`Tan.^(-1) (2x)/(sqrt3) + Tan.^(-1) (2y)/(sqrt3) = c`
`Tan.^(-1) (2x -1)/(sqrt3) + Tan.^(-1) (2y -1)/(sqrt3) = c`

ANSWER :B


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