Determine k so that k+2, 4k-6 and 3k-2 are three consecutive terms of an A.P.
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by using the condition to be in AP
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Conditions for AP is 2b=a +c
a=k+2 b=4k-6 c=3k-2
2b=a+c
2(4k-6)= k+2*3k-2
8k-12 =4k^2+6k-2k-4
4k^2+6k-2k-8k+12-4=0
4k^2-4k+8=0
(Div the eq. by 4)
k^2-k+2=0
(k-2)(k+1)=0
k=2 or k=-1
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