- #1
jackcr
- 8
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Hello,
Second term of a geometric series is 48 and the fourth term is 3... Show that one possible value for the common ratio, r, of the series is -1/4 and state the other value.
ar=48, ar^3= 3... so ar^3/ar=3/48 which simplifies to r^2 = 1/16, therefore r = 1/4
Can anyone explain where the other solution is from? Or where I am wrong
Thanks, and sorry if this is in the wrong section, I'm not familiar with pre/post calculus
Second term of a geometric series is 48 and the fourth term is 3... Show that one possible value for the common ratio, r, of the series is -1/4 and state the other value.
ar=48, ar^3= 3... so ar^3/ar=3/48 which simplifies to r^2 = 1/16, therefore r = 1/4
Can anyone explain where the other solution is from? Or where I am wrong
Thanks, and sorry if this is in the wrong section, I'm not familiar with pre/post calculus