SOLUTION: How many positive real zeros does the funtion f(x) = x4 + x3 - 7x

SOLUTION: How many positive real zeros does the funtion f(x) = x4 + x3 - 7x - 1 have?

Question 3694: How many positive real zeros does the funtion f(x) = x4 + x3 - 7x - 1 have?

Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!

Graphing this, gives a root just less than zero (so ignore that), and one between 1 and 2...so the answer looks to be 1 positive root

You can find the sign of f(0), then a few values of x, to semi-proof this finding...as x increases, so the term will dominate hence the curve will not turn back and cross the x-axis again.

jon.
RELATED QUESTIONS
How many positive real zeros does the function f(x) = x4 + x3 � 7x � 1 have? a) 3 or 1... (answered by fcabanski)

How many negative real zeros does the function f(x) = x5 + x4 � x2 � x + 1... (answered by Fombitz)

Please lend me a helping hand. I would really appreciate your help and may God bless you... (answered by stanbon)

I really need help with this as fast as possible thanks alot! What are all the... (answered by solver91311)

Please can someone help me solve the following. I would really appreciate some help.... (answered by stanbon)

Given:{{{ f(x)=3x^5-4x^4+x^3+6x^2+7x-8 }}} How many total zeros does the function... (answered by psbhowmick)

State how many imaginary and real zeros the function has. f(x) = x3 + 5x2 + x + 5 (answered by MathLover1)

Use Descartes rule of signs to determine how many positive and how many negative real... (answered by mukhopadhyay)

How many positive zeros does f(x)= x^5-2x^4-3x^3+x^2+x-1 have? (answered by MathLover1)