points SCalc7 7.8.001. plain why each of the following integrals is improper. (a) 4 X کنا X- 3 dx Since the integral has an infinite interval of integration, it is a Type 1 improper integral Since the integral has an infinite discontinuity, it is a Type 2 improper integral. The integral is a proper integral. (b) 00 1 1+x3 dx Since the integral has an infinite interval of integration, it is a Type 1 improper integral. Since the integral has an infinite discontinuity, it is a Type 2 improper integral. The integral is a proper integral. 0 (C) xx dx Since the integral has an infinite interval of integration, it is a Type 1 improper integral. Since the integral has an infinite discontinuity, it is a Type 2 improper integral. The integral is a proper integral. (d) π/4 cot x dx Since the integral has an infinite interval of integration, it is a Type 1 improper integral. Since the integral has an infinite discontinuity, it is a Type 2 improper integral. The integral is a proper integral. Need Help? Read It Talk to a Tutor