II. Answer the following questions: (3x4=12]
6. The sum of first three terms of a G.P. is 13/12
and their product is -1. Find the common ratio and the terms. give me correct answers plz... because it's urgent
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Let the three terms be a/r,a,ar.
So,a/r×a×ar= -1
a^3= -1
a^3= -1^3
a= -1.
a/r+a+ar=13/12
-1-r^2/r=25/12
-12r^2-12=25r
12r^2+25r+12=0.
12r^2+16r+9r+12=0
4r(3r+4)+3(3r+4)=0
3r+4=0
r= -4/3........
So the terms are 3/4,-1,4/3.
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