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PLEASEEEE I NEED HELP!!!! Find k in the following arithmetic sequence: 4k-k^2, 3k, k
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1 vote
PLEASEEEE I NEED HELP!!!!
Find k in the following arithmetic sequence:
4k-k^2, 3k, k

User Vadimich
by
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1 Answer

6 votes
3k - (k-2) = (k-2) - (k+7) 3k = (k-2) - (k+7) + (k-2) 3k = 2(k-2) - (k+7) 3k = 2k - 4 - k - 7 3k = k - 11 2k = -11
k = -5.5
User Fishiwhj
by
7.4k points
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