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Mathematics, 22.03.2021 21:30 cristabean87

two Aps have the same first and last terms. the first Ap has 21 terms with a common difference of 9. how many terms has the other Ap if its common difference is 4?​

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two Aps have the same first and last terms. the first Ap has 21 terms with a common difference of 9....
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