Exam 1: The Derivative

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Find the equation of the following line: Parallel to y = - 14\frac { 1 } { 4 } x + 8; (4, 4) on line.

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A winter storm front moves through campus. At t hours after the onset of the storm, the temperature is given by T(t)=35−2t2+tT ( t ) = 35 - 2 t ^ { 2 } + t What is the temperature 3 hours after the storm begins? Enter just an integer, no units.

(Short Answer)
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Find the equation of the following line: (2, 3) and (4, 6) on line. Enter your answer in slope-intercept form. Include both the slope and the intercept in your equation.

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A winter storm front moves through campus. At t hours after the onset of the storm, the temperature is given by T(t)=35−2t2+tT ( t ) = 35 - 2 t ^ { 2 } + t . At what rate is the temperature changing 3 hours after the storm begins?  Enter just an integer, no unit \text { Enter just an integer, no unit }

(Short Answer)
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At time t = 0, a seed is planted. After t weeks, the height of the plant is given by f(t)=0.3t2+0.6t+0.5f ( t ) = 0.3 t ^ { 2 } + 0.6 t + 0.5 inches. At what rate is the plant growing after 8 weeks?

(Multiple Choice)
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Write the word or phrase that best completes each statement or answers the question. -y = x4+1\sqrt { x ^ { 4 } + 1 } Enter your answer exactly as: dydx=P(x)Q(x)\frac { d y } { d x } = \frac { P ( x ) } { \sqrt { Q ( x ) } } where P(x) and Q(x) are polynomials in standard form.

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Write the word or phrase that best completes each statement or answers the question. -y = 43x3+x2+4\frac { 4 } { 3 x ^ { 3 } + x ^ { 2 } + 4 } Enter your answer as just: P(x)(Q(x))a\frac { \mathrm { P } ( \mathrm { x } ) } { ( \mathrm { Q } ( \mathrm { x } ) ) ^ { \mathrm { a } } } where P(x) and Q(x) are polynomials in standard form.

(Short Answer)
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Find ddu\frac { \mathrm { d } } { \mathrm { du } } u4−7\sqrt { u ^ { 4 } - 7 } .

(Multiple Choice)
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If (x,y) is a point on the parabola y = 3 x2x ^ { 2 } , then the tangent line to y = 3 x2x ^ { 2 } passing through (x,y) has slope 6x. Find the equation of the line tangent to y = 3 x2x ^ { 2 } through the point (-2, 12).

(Multiple Choice)
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What is the equation of the tangent line to the graph of y = x2x ^ { 2 } at the point where x=13x = \frac { 1 } { 3 } ? Enter your answer in standard point-slope form.

(Short Answer)
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Find the slope of the graph of y = x9x^9 - 2x + (5−x)3( \sqrt { 5 - x } ) ^ { 3 } at (1, 7). Enter just an integer.

(Short Answer)
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Calculate the following limit(s) if they exist. - lim⁡x→−2\lim _ { x \rightarrow - 2 } x(x3+8)−1\frac { x } { \left( x ^ { 3 } + 8 \right) ^ { - 1 } } Enter either a fraction, integer, or the words "does not exist".

(Short Answer)
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Write the word or phrase that best completes each statement or answers the question. -y = - 12x2\frac { 1 } { 2 x ^ { 2 } } Enter your answer exactly in the form: a xbx ^ { b } where a,b are fractions or integers. No parentheses. If a power or coefficient is "1" then leave it off.

(Short Answer)
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Find the second derivative of f(x) = 7 x2x ^ { 2 } + 7x - 7

(Multiple Choice)
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Let f(x) = x3−9x2x+6\frac { x ^ { 3 } - 9 x } { 2 x + 6 } . Is f(x) continuous at x = -3?

(True/False)
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Find the (instantaneous) velocity at time t = 2 seconds for a falling object where the height function is given by h(t)=−16t2+60t+30h ( t ) = - 16 t ^ { 2 } + 60 t + 30 in feet.

(Multiple Choice)
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For the graphed function below, state the x-values for which the derivative does not exist. For the graphed function below, state the x-values for which the derivative does not exist.

(Multiple Choice)
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Find the equation of the tangent line to the curve y = x2+5\sqrt { x ^ { 2 } + 5 } at (2, 3). Enter your answer in standard point-slope form using reduced fractions and integers.

(Short Answer)
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Find the equation of the following line: Slope is - 57\frac { 5 } { 7 } ; (−12,1)\left( - \frac { 1 } { 2 } , 1 \right) on line. Enter your answer in point-slope form.

(Short Answer)
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Find the average rate of change for f(x)=−3x2−2x+5f ( x ) = - 3 x ^ { 2 } - 2 x + 5 on [-2, 1]

(Multiple Choice)
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