Question 1158766
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The second term is the first term, multiplied by the common ratio:<br>
{{{6 = 15*r}}}
{{{r = 2/5}}}<br>
The 4th term is the 2nd term, multiplied by the common ratio 2 times:<br>
{{{6*(2/5)^2}}}<br>
You can do the calculation...<br>