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23 September, 07:57

One of Jimmy's friends told him that he would save more if, instead of multiplying the amount by 3 each week, he added enough at the end of 5 weeks to multiply the existing amount by 3. Use summation notation to write this as a sum and find the total amount he would save using this plan.

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  1. 23 September, 08:11
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    what was the initial amount?

    Step-by-step explanation:

    i might need more information.
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