3) Later in this course, we will learn that the function, arctan x, is equivalent to a power series for x on the interval -1

College Algebra
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ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 25RE: Use the formula for the sum of the first nterms of a geometric series to find S9 , for the series...
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Part D and E please!

3) Later in this course, we will learn that the function, arctan x, is equivalent to a power series for x on
the interval -1<xsl:
arctan x = 2 (-1)"
2n +1
n=0
We can use this power series to approximate the constant n.
a) First, evaluate arctan(1). (You do not need the series to evaluate it.)
b) Use your answer from part (a) and the power series above to find a series representation for 7.
(The answer will be just a series – not a power series.)
c) Verify that the series you found in part (b) converges.
d) Use your convergent series from part (b) to approximate z with Jerror| < 0.5.
|<0
e) How many terms would you need to approximate z with |error| < 0.001?
Transcribed Image Text:3) Later in this course, we will learn that the function, arctan x, is equivalent to a power series for x on the interval -1<xsl: arctan x = 2 (-1)" 2n +1 n=0 We can use this power series to approximate the constant n. a) First, evaluate arctan(1). (You do not need the series to evaluate it.) b) Use your answer from part (a) and the power series above to find a series representation for 7. (The answer will be just a series – not a power series.) c) Verify that the series you found in part (b) converges. d) Use your convergent series from part (b) to approximate z with Jerror| < 0.5. |<0 e) How many terms would you need to approximate z with |error| < 0.001?
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