A 2-0 resistor and a variable resistor of resistance R are placed in parallel. The expression for the resulting resistance RT is given by RT = , + . 2R . Determine the limiting value of RT as R-+co. The limiting value of RT is (Simplify your answer.) MacBook Pro 20 DIFind the point(s) where a tangent line to the curve y = f(x) = 4x" has slope mtan = 40. The point(s) is (are). (Type an ordered pair. Use a comma to separate answers as needed.) Nex MacBook Pro DD 20 F6 F7 F9 F10 F11 F12 esc @