question:

Geometric Sequence

If you save P1 today, P2 tomorrow, and P4 the next day (doubling your saving everyday)

how many days will it take to be a millionaire?

answer:

solution:

a1 = 1

a2 = 2

a3 = 4

r= 2

it will take 20 days to be a millionaire

explanation:

i use the formula  to find the total of days to become a millionaire. it is the formula in finding the sum of geometric sequence

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