Solve the following problems, showing any necessary work. You must give EXACT answers, not decimal approximations (unless stated otherwise). Use the limit definition of the derivative to find f' where f(x) = 3x2 + 7x 5. Use the Squeeze Theorem to evaluate lim f(x) if it is known that '2x2 +7x2S f(x) +x+l for all real numbers x.