Question
Let f(x) = x 2 + ax + 2. Find the values of a such that...
Let f(x) = x 2 + ax + 2. Find the values of a such that f(x) > 0 for every x.
Homework Answers
Answer #1
we are given
We can find discriminant
a=1
b=a
c=2
For f(x) >0 , leading coefficient must be positive and D must be negative
leading coefficient =1...which is positive
so,
now, we can find solution
and we get
...........Answer
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