1)if y=x³+2x²+7x+8 then dy by dx will be-

Question

2) if y= 1/x⁴ then, dy by dx will be:
3) if y = x² sin x, then dy/dx will be-

Answer 1

1) do it the same way I did the previous question 1

2) (bottom derivative top - top derivative bottom ) / bottom squared

( x^4 * 0 - 1*4x^3 )/x*8

= - 4 /x^5

3) x^2 cos x - sin x (2x)
you finish