Question 802784: markus receives dollar bills from his grandfather for one week.On the first day he receives $2,on third day he receives $4, and on the fourth day he receives $8.if this continues,how much money will markus have by the end of the week?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! markus receives dollar bills from his grandfather for one week.On the first day he receives $2,on third day he receives $4, and on the fourth day he receives $8.if this continues,how much money will markus have by the end of the week?
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Geometric Series:::
2 + 2^2 + 2^3 + ....+ 2^7
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a = 2
r = 2
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S(n) = a(1-r^n)/(1-r) =
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S(7) = 2(1-2^7)/(1-2) = 2(-127)/(-1) = 2*127 = 254
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Cheers,
Stan H.
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