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Ratio of first and the fourth term of a GP is 8:27. If the first term is 12, what is the third term
1) 20 2) 16/3 3) 27 4) 12
Read Solution (Total 1)
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- If a=1st term=12
r=common ratio,then the g.p is
12,12r,12r^2,12r^3,12^4.....…..
Ratio of the 1st and 4th term of a g.p is 8:27
a/ar^3=8/27
1/r^3=8/27
r^3=27/8
r=3√(3^3)/(2^3)
r=3/2
The third term is
12r^2=12(3/2)^2=27 - 4 years agoHelpfull: Yes(0) No(0)
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