Apply Product Rule: We need to differentiate the function y=(2x+1)5(x3−x+1)4. This requires the use of the product rule for differentiation, which 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.
Find Derivatives: Let's denote the first function as u=(2x+1)5 and the second function as v=(x3−x+1)4. We will need to find the derivatives u′ and v′ separately.
Differentiate u: First, we differentiate u with respect to x. Using the chain rule, we get u′=5(2x+1)4⋅2, since the derivative of (2x+1) with respect to x is 2.
Differentiate v: Now, we differentiate v with respect to x. Again, using the chain rule, we get v′=4⋅(x3−x+1)3⋅(3x2−1), since the derivative of (x3−x) with respect to x is 3x2−1.
Apply Product Rule: Applying the product rule, the derivative of y with respect to x is: y′=u′v+uv′=(5(2x+1)42)(x3−x+1)4+(2x+1)5(4(x3−x+1)3(3x2−1))
Simplify y′: Now we simplify the expression for y′:y′=10(2x+1)4(x3−x+1)4+(2x+1)54(x3−x+1)3(3x2−1)
Combine Like Terms: The final step is to combine like terms if possible, but in this case, the terms are not like terms and cannot be combined further. Therefore, the simplified derivative of y is:y′=10⋅(2x+1)4⋅(x3−x+1)4+12⋅(2x+1)5⋅(x3−x+1)3⋅(x2−31)
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