a) Find the value of a such that the series 00 a E(-1)" is equal to . If it is not possible 2" n=0 write NP in the box. Answer: a = 1 b) Find the value of r such that the series 00 Σ E(-1)"- is equal to . If it is not possible write n=0 NP in the box. Answer: NP c) Find the exact value of the convergente series 00 I = 4 E(-1)" 1 If it is not possible write NP in 3" n=1 the box. Answer: I =

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A: I have given the answer in the next step. Hope you understand that