Question
The ratio of the sum of the first three terms of a GP to the sum of its first six terms is $125: 152$. The common ratio of the GP is(a) $\frac{1}{5}$(b) $\frac{2}{5}$(c) $\frac{3}{5}$(d) $\frac{4}{5}$
Step 1
The sum of the first three terms of the GP is $a(1 + r + r^2)$ and the sum of the first six terms is $a(1 + r + r^2 + r^3 + r^4 + r^5)$. Show more…
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