Identify u and v: We need to find the derivative of the function (3x−2)9x with respect to x. This is a quotient, so we will use the quotient rule which states that dxd(vu)=v2v(u′)−u(v′), where u is the numerator and v is the denominator.
Find derivative of u: Let's identify u and v for our function. Here, u=x and v=(3x−2)9. We will need to find the derivatives of u and v, which are u′ and v′ respectively.
Find derivative of v: First, we find the derivative of u with respect to x. Since u=x, the derivative u′ is simply 1 because the derivative of x with respect to x is 1.u′=dxd(x)=1
Apply quotient rule: Next, we find the derivative of v with respect to x. Since v=(3x−2)9, we will use the chain rule. The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is f(t)=t9 and the inner function is g(x)=3x−2.v′=dxd((3x−2)9)=9(3x−2)8⋅dxd(3x−2)=9(3x−2)8⋅3
Simplify expression: Now we can apply the quotient rule. We have u′=1 and v′=9(3x−2)8×3. Plugging these into the quotient rule formula, we get:(dy/dx)=(3x−2)18(3x−2)9×1−x×9(3x−2)8×3
Factor out common term: Simplify the expression by distributing and combining like terms:(dxdy)=(3x−2)18(3x−2)9−27x(3x−2)8
Cancel out common term: We can factor out a (3x−2)8 from the numerator to simplify the expression further:(dy/dx)=(3x−2)18(3x−2)8⋅(1−27x)
Final derivative: Now we can cancel out (3x−2)8 from the numerator and denominator: (dy/dx)=(3x−2)101−27x
Final derivative: Now we can cancel out (3x−2)8 from the numerator and denominator:(dy/dx)=(3x−2)101−27xWe have found the derivative of the function (3x−2)9x with respect to x, which is:(dy/dx)=(3x−2)101−27x
More problems from Find derivatives of using multiple formulae