Exam 11: Derivatives of Exponential and Logarithmic Functions

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Find the derivative of the following function. y=5e3x23y = 5 e ^ { 3 x ^ { 2 } - 3 }

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Find the derivative of the following function. y=3e6x+6y = 3 e ^ { 6 \sqrt { x } } + 6

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After t years, the remaining mass y(in grams) of 16 grams of a radioactive element whose half-life is 32 years is given by y=16(12)t/32y = 16 \left( \frac { 1 } { 2 } \right) ^ { t / 32 } , for t0t \geq 0 . How much of the initial mass remains after 96 years? Round your answer to two decimal places.

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Solve the following equation for xx accurate to three decimal places. lnx2=3\ln x ^ { - 2 } = 3

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Find yy ^ { \prime } . y=4(lnx)9y = 4 ( \ln x ) ^ { - 9 }

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Find the derivative of the function y=lnx27y = \ln \sqrt { x ^ { 2 } - 7 } .

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Write the logarithmic equation ln\ln 1.3=0.2624 K1.3 = 0.2624 \mathrm {~K} as an exponential equation.

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Future value. The future value that accrues when $900 is invested at 5%, compounded continuously, is s(t)=900e005ts ( t ) = 900 e ^ { 005 t } , where t is the number of years. At what rate is the money in this account growing when t=9?t = 9 ?

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Find the derivative of the following function. y=ln5xy = \ln 5 x

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Simplify lne6x4\ln e ^ { - 6 x ^ { 4 } }

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Find dydx if y=ln(x6(x2x+4))\frac { d y } { d x } \text { if } y = \ln \left( x ^ { 6 } \left( x ^ { 2 } - x + 4 \right) \right) .

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Find the derivative of the following function. y=89x+1y = 8 ^ { 9 x + 1 }

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Write the following expression as a logarithm of a single quantity. lnx16ln(x2+1)\ln x - 16 \ln \left( x ^ { 2 } + 1 \right)

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Find an equation of the tangent line to the graph of y=e5xy = e ^ { 5 x } at the point (0,1) .

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With an annual rate of inflation of 4% over the next 10 years, the approximate cost of goods or services during any year in the decade is given by C(t)=P(1.04)t,0t10C ( t ) = P ( 1.04 ) ^ { t } , 0 \leq t \leq 10 where is the time (in years) and is the present cost. The price of an oil change for a car is presently $24.95.Estimate the price 10 years from now.

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Sketch the graph of the function f(x)=lnxf ( x ) = \ln | x | .

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If x9xe4y=5, find dy/dxx - 9 x e ^ { 4 y } = 5 , \text { find } d y / d x

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After t years, the value of a car that originally cost $\$ 17,000 depreciates so that each year it is worth 34\frac { 3 } { 4 } of its value for the previous year. Find a model for V(t), the value of the car after t years.

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Use the given information to write an exponential equation for y. Does the function represent exponential growth or exponential decay? dydt=2y,y=10 when t=0\frac { d y } { d t } = 2 y , y = 10 \text { when } t = 0

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Write the expression 5ln(x)+2ln(x+3)5ln(x3)5 \ln ( x ) + 2 \ln ( x + 3 ) - 5 \ln ( x - 3 ) as the logarithm of a single quantity.

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