SOLUTION: How many positive real solutions are there in:
f(x)=x^4-4x^3+6x^2-4x+1
a)1 or 0
b)2 or 0
c)4 or 2
d)2 or 0
Algebra.Com
Question 146280: How many positive real solutions are there in:
f(x)=x^4-4x^3+6x^2-4x+1
a)1 or 0
b)2 or 0
c)4 or 2
d)2 or 0
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
First count the sign changes of
From to , there is a sign change from positive to negative
From to , there is a sign change from negative to positive
From to , there is a sign change from positive to negative
From to , there is a sign change from negative to positive
So there are 4 sign changes for the expression .
So there are 4, 2, or 0 positive zeros
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