runaway173
01.12.2021 •
Mathematics
Given f(x)=2x^3+kx-9 and x-1is a factor of f(x), then what is the value of k?
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Ответ:
When it says the "x - 1 " is the factor of that function means when you find the root of the phrase x - 1 which is x = 1 , put it in the function then you have to get zero for the answer :
thus :
Thus :
So :
Add both sides 7
There you go...
Have a great day ❤
Ответ: