(-1)*x2* 1. For all x E R, cos x = (2n)! n=0 b. Differentiate the series in item 1(a) to find a power series that is equal to cos(x²) – 2x² sin(x²) for all x E R.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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(-1)"x2n
Σ
(2n)!
1. For all x E R, cos x =
n=0
b. Differentiate the series in item 1(a) to find a power series that is equal to cos(x²) – 2x² sin(x²) for
all x E R.
Transcribed Image Text:(-1)"x2n Σ (2n)! 1. For all x E R, cos x = n=0 b. Differentiate the series in item 1(a) to find a power series that is equal to cos(x²) – 2x² sin(x²) for all x E R.
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