Let f(x) da = 15, f(x) dx = 11, g(x) dx = -6, g(x) dx = -11, Use these values to evaluate the given definite integrals. 2) ( f ( a ) + 9 ( 20 ) ) da = 6) ( f ( 20 ) - 9 ( 20 ) ) dac = (3f (x ) + 29(2) da =[ d) Find the value a such that (af (x) + g(x)) dx = 0. a