Question

1. Differentiate, y = x2sin 7x find x

Answer 1

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y = x sin7x

differentiating with respect to x

$\frac{dy}{dx} = 1.sin7x + x.cos7x.7$

Answer 2

Answer:

y=x2sin7x

diff. y w.r.t x

dy/dx = d/dx(x2sin7x)

=x•d/dx2sin7x+2sin7x•d/dx x

=2xcos7x•d/dx7x+2sin7x(1)

=2xcos7x7+2sin7x

=14xcos7x+2sin7x