AP Calculus AB - Practice Test 1 Q&A
AP Calculus AB Practice Test 1 (Differentiation)
Part I: Multiple Choice: No Calculator
This function has a discontinuity where the denominator is zero.
i.e., at
. If this discontinuity is removed, then, we have:
So,
Answer: E
For this rational function, the highest power of takes over when calculating a limit. Since the term exists in the denominator and not in the numerator, the ratio of the two polynomials gets smaller and smaller as , eventually approaching .
Alternatively, apply L'Hospital's rule repeatedly (5 times) until you have a constant in the numerator and a linear term in the denominator. The ratio can then be seen to approach zero as .
Answer: A
Answer: D
Page |2
Use the chain rule in Lagrange (Prime) Notation.
, where:
Answer: B
This limit is the definition of a derivative.
Answer: A
Answer: B
Page |3
Check the conditions one at a time. .
,
II. is differentiable at
II is TRUE
, and so must be continuous at
.
III. The first derivative provides the slope of the tangent line. Since
, there must be a tangent of slope (horizontal) at
.
III is TRUE
Answer: E
Then, set:
Answer: D
Page |4
Here are the trigonometry double-angle formulas:
Answer: C
This is a rational function with a hole
at
and a vertical asymptote
at
.
A hole exists if the multiplicity of a root in the denominator the multiplicity of the same root in the numerator.
A vertical asymptote exists if the multiplicity of a root in the denominator the multiplicity of the same root in the numerator.
To get the horizontal asymptote, calculate:
Image from the Algebra App available at mathguy.us
Using L'Hospital's Rule, take the
derivatives of the numerator and
denominator twice, to get
.
Answer: D
Part II: Multiple Choice: Calculators Are Allowed Use implicit differentiation:
Page |5
Then, using the point-slope form of a line:
So, the slope of the tangent line,
Answer: C
Image from the Algebra App available at mathguy.us
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