8. Using the Ratio Test find the radius of convergence and interval of convergence. an+1 Let L= lim an n=1 2•4•6••••••(2n) A. L= 0, then R = 0 and I= 0 B. L=1, then R=1 and I= (- 1, 1) C.L = 2, then R= 2 and I= (- 2, 2) D. L=0, then R= 00 and I= (-0o, 00)

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