Formulas of Arithmetic Sequences

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Simone's grandmother gives them $1000 to start a college fund. The grandmother will then add $200 each month if Simone adds $20 each month. What is a formula that would tell us the amount of money in the fund after x months? You do NOT need a_n in your formula.

Mathematical Equivalence

ON

Simone's grandmother gives them $1000 to start a college fund. The grandmother will then add $200 each month if Simone adds $20 each month. What is a formula that would tell us the amount of money in the fund after x months? You do NOT need a_n in your formula.

Mathematical Equivalence

ON

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