melissav2018 melissav2018

05-12-2016
Mathematics

contestada

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

Respuesta :

808lilglock 808lilglock

05-12-2016

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

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