Q. Given the function y=(10x+10)(x3−x2+1), find dxdy in any form.Answer: dxdy=
Identify function: Identify the function to differentiate.We are given the function y=(10x+10)(x3−x2+1) and we need to find its derivative with respect to x, which is denoted as dxdy.
Apply product rule: Apply the product rule for differentiation.The product rule states that the derivative of a product of two functions is the derivative of the first function times the second function plus the first function times the derivative of the second function. Let's denote u=10x+10 and v=x3−x2+1. Then, dxdy=u′(v)+u(v)′.
Differentiate u: Differentiate u=10x+10 with respect to x. The derivative of u with respect to x is u′=dxd(10x+10)=10.
Differentiate v: Differentiate v=x3−x2+1 with respect to x. The derivative of v with respect to x is v′=dxd(x3−x2+1)=3x2−2x.
Substitute into formula: Substitute u′, v, and v′ into the product rule formula.dxdy=u′(v)+u(v)′=10(x3−x2+1)+(10x+10)(3x2−2x).
Expand and simplify: Expand the terms and simplify the expression.dxdy=10x3−10x2+10+(30x3−20x2+30x2−20x).
Combine like terms: Combine like terms.(dy)/(dx)=10x3−10x2+10+30x3−20x2+30x2−20x(dy)/(dx)=40x3−10x2+30x2−20x+10(dy)/(dx)=40x3+20x2−20x+10