Question 1127086
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{{{T[3]}}} = {{{3*r^2}}} = 48  ====>


{{{r^2}}} = {{{48/3}}} = 16  ====>  r = {{{sqrt(16)}}} = +/- 4.


Since r should be positive, according to the condition, it implies that r = 4.



<U>Answer</U>.  r,  or the common ratio, is equal to  4.
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