If 1/3
is one of the solutions of equation 12x2 + kx + 1 = 0, then k =
(7, - 7, -2)
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Step-by-step explanation:
p(x) = 12x² - kx + 1
if one of the solutions is 1/3 ,
then p(1/3) = 0
= 12 ( 1/3)²- k(1/3) + 1=0.
12 ×1/9 -k(1/3) = -1
4 /3 -k/3 = -1
4-k /3 = -1
4-k = -3
k = 7 .
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