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(x+ 3 ) " 19) Find the interval of convergence n 1 (n - 2)2" 20) Find the power series for f(x) 4x centered at x = 0. 2x + 3 21) Find the Taylor's polynomial for f(x) =e"* centered at x = 1. 0.5 22) Given the function f(x) = E (-1)" x 2n+1 find f (x) dx to four decimal places. 1=0 2n+1 0