Use the geometric sequence of numbers 1, 1/2, 1/4, 1/8,…to find the following:
a) What is r, the ratio between 2 consecutive terms?
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b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? Please round your answer to 4 decimals.
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c) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 12 terms? Please round your answer to 4 decimals.
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2007-03-11 13:21:41 · 3 answers · asked by Anonymous in Entertainment & Music ➔ Jokes & Riddles
f {n+1} = r * f {n} so r = 1/2 in this case
SUM f(x) x=0 to x=n is 1 + 1/2 + ..... + 1/2^n = 2-1/2^n
Sum x=0 to x=9; 2-1/2^9 = 1.9980
Sum x=0 to x=11; 2-1/2^11 = 1.9995
Is this a joke or should it be under mathematics
2007-03-11 13:30:44 · answer #1 · answered by kinvadave 5 · 0⤊ 0⤋
to be honest, it would've been better if you placed this question under mathematics!
It has a category, you know.
cause to tell you the truth, this does not fit the jokes and riddles spirit......therefore i refuse to answer this.......watever!
2007-03-11 13:30:02 · answer #2 · answered by Ms* Shae* 3 · 0⤊ 0⤋
hahahahahahaha
back to school everybody hahahahahaha
2007-03-11 13:26:07 · answer #3 · answered by kenmauiphoto 5 · 1⤊ 0⤋