chhantyalniruta544 chhantyalniruta544

01-08-2021
Mathematics

contestada

how many terms of the series 1+4+7........will add up to 425?

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Аноним Аноним

02-08-2021

Answer:

17 terms

Step-by-step explanation:

Let the number of terms be n which will add up to 425.

So, 425=(n/2)*(2+(n-1)*3). 850=n*(3n-1), n=17 or - 50/3 but n can't be negative, so the answer is n=17

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