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Multiple Choice
Which of the following is a power series representation for the function centered at ?
A
B
C
D
Verified step by step guidance
1
Step 1: Recall the power series representation for the function arctan(x), which is given by: arctan(x) = ∑_{n=0}^∞ ((-1)^n * x^(2n+1)) / (2n+1). This series is centered at x = 0.
Step 2: Substitute x^3 into the arctan(x) series to represent arctan(x^3). This substitution modifies the series to: arctan(x^3) = ∑_{n=0}^∞ ((-1)^n * (x^3)^(2n+1)) / (2n+1).
Step 3: Simplify the exponent of x in the series. Since (x^3)^(2n+1) = x^(3*(2n+1)), the series becomes: arctan(x^3) = ∑_{n=0}^∞ ((-1)^n * x^(6n+3)) / (2n+1).
Step 4: Multiply the entire series by x^6 to account for the given function f(x) = x^6 * arctan(x^3). This modifies the series to: f(x) = x^6 * ∑_{n=0}^∞ ((-1)^n * x^(6n+3)) / (2n+1).
Step 5: Combine the powers of x. Since x^6 * x^(6n+3) = x^(6+6n+3), the final series representation becomes: f(x) = ∑_{n=0}^∞ ((-1)^n * x^(6+6n)) / (2n+1).