which is not a polynomial?
p(x)=x^4-1/2x^3+5x^2-4.144x+1
f(x)=sqrt2x-5
g(x)=-(x-4)^3(x+5)^4(3-9x)^8
h(x) = x^3-2x^2+3x-x^-1+1

Question

which is not a polynomial?
p(x)=x^4-1/2x^3+5x^2-4.144x+1
f(x)=sqrt2x-5
g(x)=-(x-4)^3(x+5)^4(3-9x)^8
h(x) = x^3-2x^2+3x-x^-1+1

jdoe0001 · Answer

http://openstudy.com/updates/5276af96e4b0275c538545a9

jdoe0001 · Answer

hmmm if the "x" variable is not the exponential one, then you'd know is a horizontal parabola and thus it won't pass the "vertical line test" and thus is not a $\bf function$ per definition

anonymous · Answer

I don't get it ...  Is a function the same as a polynomial? How can I figure out that the f(x) isn't a polynomial by looking at it. Do I have to solve every problem?

ikram002p · Answer

polynomial is a formula of the function that could be written as sum of power variable .
see which one of them cant be written as sum of power variable

anonymous · Answer

sum of power variable?

ikram002p · Answer

am gonna give u example for polynomial
$$x^5+3x^4+2x=0$$

ikram002p · Answer

"sum of power variable" i;m not sure if said it correctly  wat i ment is u have a variable x for example .

ikram002p · Answer

still confused ??

jdoe0001 · Answer

http://www.mathsisfun.com/definitions/polynomial.html

anonymous · Answer

yes

anonymous · Answer

thank you Jdoe!

jdoe0001 · Answer

yw

anonymous · Answer

It cant have a negative exponent?

anonymous · Answer

h(x) is not a polynomial then?