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CALCULUS – SEC. 5.4 Review logarithms, derivatives of natural logs, and learn and apply the rules for derivatives of y e x REVIEW #1 Rewrite into exponential form: log3 81 4 REVIEW #2 Rewrite using rules for logarithms ( +, -, exponent rule) x x2 5 ln y REVIEW #3 Solve for x; round to three decimal places, please. 54 x 670 REVIEW #4 Find the derivative: y ln 5 x 2 3 SECTION 5.4 – Derivatives involving y e x Type into your calculator: Which represents Y1 (1 1 / x) x 1 y 1 x x Go to TABLE and continue scrolling “to infinity”. What value is this function approaching? ______________________________ x 1 So, lim 1 ________ x x THIS IS ONE OF THE EASIEST DERIVATIVE RULES YOU WILL LEARN!! y e x then y ' _____________ EX. 1 but y e f ( x ) then y ' _____________ y e5x EX. 2 y e4x EX. 3 y ln e 2 x 4 x EX. 4 e2 x y ln 2 x e 1 2 EX. 5 e2 x y 2x e 1 EX. 6 y 2 x e4 x (NOT the same as EX. 4!)