2. Select all that are true: a) If , f(x) dx = 5 and ? f(x)dx = 8, then , f(x)dx = -3 b) If g(x) = S, f(t) dt, g(1) = 0 c) S f(x)g(x)dx = Sf(x)dx ] g(x)dx d) When using substitution to evaluate f sin(x) cos3 x dx, we should let u = sin x e) [ 2"dx =; 2 TI In 2 3. If the graph of f shown consists of two line segments and a semicircle and g(x) = So f(t) dt, find g (5). 2.5 35 0'S 45 5 5 -0.5. -1.5 4. Approximate J, x2 + 3x dx using the midpoint rule with n = 4 (Ans: 360)