Question: can someone answer this? Prove or disprove Let 2:11 an and 2:11 b be two series of numbers and suppose that {a}.1 In E N}

can someone answer this?

Prove or disprove Let 2:11 an and 2:11 b be two series of numbers and suppose that {a}.1 In E N} : {bu | n e N}. Then 22:1(23 is convergent if and only if 22:1 bn is convergent

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