find k if 2k+1,k, 3k+2are in G.P
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Answer:
-1 or -2/5
Step-by-step explanation:
If p,q,r are in gp then
q²=pr
thus k²=(2k+1)(3k+2)
thus k²=6k²+7k+2
thus 5k²+7k+2=0
thus (x+1)(5x+2)=0
thus k is either -1 or -2/5
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