Ö -2 Use partial fractions to find the power series off(x) = (x²+4) (x²+2)* Select the correct answer below: Of(x) = (2+1+ n+1 · 2 (2+ + (-)" ) x²0 n=0 00 n+1 n+1 010) = (-(-1)^¹ + (-2))x² f(x) 2 2 n=0 00 O ○ f(x) = 2 (-(-1) Content attribution. W #3 n=0 n+1 n+1 0 100 = 2 (-(+) + (1)"") x² O f(x) n=0 3 80 E $ n+1 4 +2²+1 R % x ²0 5 x²n T < 6 MacBook Pro Y & 7 U * 8 I ( 9 0 A 0

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Q: what is the summation where k = 1 of e^-2k

A: