1.

If y = tan ^(-1)((2x)/( 1+15x^(2)) ) , and (dy)/(dx)= ( lambda)/( 1+25x^(2))-( mu)/( 1+9x^(2))," then "lambda + muequal

Answer»

`8`
` 2`
` 10 `
` 34`

ANSWER :A


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