(a-x)Va-x+(b-xNx- dy , then dx 29. y%3D where Ja- va-x-Vx-b ever it is defined is x+(a+b) 1) 2--b Va- x) (x-b) 2) 2x+ a+b 4) a+b 3) 2 (a-x)(x-b) 2 (a-x)(x-b) dy 30. If (sin x) (cos y)%3= 1 then dx 2 is 1)-4 2) -2 3) -6 4) 0 31. Let u(x) and v(x) be differentiable functions u() =7. If v(x) u'(x) 3P and such that p+q has the value equal to u(x) =Dq then v (x) p-q I) 1 2) 0 3)7 4)-7 32. Let f:(-1,1) R be a differentiable function with f(0) = -1 and f'(0)=1. Let g(x)%=[/(2f(x)+2)]f then g'(0) I) 0 2)-2 3)4 4)4