r = (1/4) / (5/12) = (9/100) / (3/20)
is this true ? Can you do the calculation(s) ? Can you try ??
(1/4) * (12/5) = 3/5
(9/100) * (20/3) = 3/5
the common ratio is: r = 3/5
check another pair of terms in the sequence...do something !
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