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Question

Find K
If K2+4K+8,2K2+3K+6 and 3K2+4K+4 are any 3 consecutive terms of A.P

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Solution

K2+4K+8,2K2+3K+6,3K2+4K+4
K2+4K+8=a
2K2+3K+6=b
3K2+4K+4=c
2b=a+c
4K2+6K+12=4K2+8K+12
2K=0
K=0
K=0

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