possible Evaluate the double integral. Select the order of integration carefully; the problem is easy to do one way and difficult the other. 1 xyexy2 dA; R = {(x,y) | 7 sx= 13, 0sys1} R xy exy dA= RA function f(x) is given below. Express the relationship between f'(x) and f(x) in words, and write a differential equation that f(x) satisfies f(x) = 17 e -x Express the relationship between f'(x) and f(x) in words. Choose the correct answer below. O A. The derivative of f(x) is - 1 times f(x) O B. The derivative of f(x) is - 1 times e raised to the - x - 1 power. O c. The derivative of f(x) is - 17 times f(x) O D. The derivative of f(x) is the same as f(x). f(x) satisfies the differential equation y' = (Type an expression using y as the variable.)