Question

Find the Maclaurin series for f(x) using the definition of a Maclaurin series. [Assume that f...

Find the Maclaurin series for f(x) using the definition of a Maclaurin series. [Assume that f has a power series expansion.]

 f(x) = ln(1+2 x)  sum_(n=1)^(infinity) (-1)^n((2 x)**n)/n  sum_(n=0)^(infinity) (-1)^(n+1)((1+(2 x)**n))/n!  sum_(n=1)^(infinity) (-1)^n((1+(2 x)**n))/n  sum_(n=1)^(infinity) (-1)^(n-1)((2 x)**n)/n  sum_(n=1)^(infinity) ((2 x)**n)/((n-1)text(!))


Find the associated radius of convergence, R.
R =

0 1
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Answer #1

The Maclaurin series of a function f(x) is given by:

Evaluate at x = 0.

Let's write the first few terms:

This would be harder than usual but I was given choices, and you will see that:

Which is equivalent tho the series that I derived for ln(1 + 2x).

It's the 4th choice.

answered by: ash
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