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If y = int(u(x))^(v(x))f(t) dt, let us d...

If `y = int_(u(x))^(v(x))f(t) dt`, let us define `(dy)/(dx)` in a different manner as `(dy)/(dx) = v'(x) f^(2)(v(x)) - u'(x) f^(2)(u(x))` alnd the equation of the tangent at `(a,b)` as `y -b = (dy/dx)_((a,b)) (x-a)`
if `int_(x^(3))^(x^(4))lnt dt`, then `lim_(xrarr0^(+)) (dy)/(dx)` is

A

0

B

1

C

2

D

-1

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A
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