Q. Evaluate∫−34(2kx+3kx2)dxgiving your answer in terms of k.
Write Integral Function: Write down the integral that needs to be evaluated.We need to evaluate the definite integral of the function 2kx+3kx2 from x=−3 to x=4.∫−34(2kx+3kx2)dx
Apply Linearity: Apply the linearity of the integral to split the integral into two separate integrals.∫−34(2kx+3kx2)dx=∫−342kxdx+∫−343kx2dx
Evaluate First Integral: Evaluate the first integral ∫−342kxdx. The antiderivative of 2kx with respect to x is kx2. We will evaluate this antiderivative from −3 to 4. kx2∣x=−3x=4=k(42)−k(−32)=16k−9k=7k
Evaluate Second Integral: Evaluate the second integral ∫−343kx2dx. The antiderivative of 3kx2 with respect to x is kx3. We will evaluate this antiderivative from −3 to 4. kx3∣x=−3x=4=k(43)−k(−33)=64k−(−27k)=64k+27k=91k
Combine Results: Combine the results from Step 3 and Step 4 to get the final answer.The final answer is the sum of the two evaluated integrals:7k+91k=98k
More problems from Evaluate definite integrals using the chain rule