## University Calculus: Early Transcendentals (3rd Edition)

a) $\int^{4}_{0}f(z)dz= \int^{3}_{0}f(z)dz+\int^{4}_{3}f(z)dz$ $⇒7=3+\int^{4}_{3}f(z)dz$ $⇒\int^{4}_{3}f(z)dz= 7-3=4$. b) $\int^{3}_{4}f(t)dt=\int^{3}_{4}f(z)dz= -\int^{4}_{3}f(z)dz$ $=-4$