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Why are these not polynomial functions?
We know that a polynomial function is anything with a positive exponent and a rational number.
c) 1 / x^3 - 4
(do we use exponents to verify ?)
ie) 1^1 / x^3 -4^1
1-3 = -2 , 1-1 = 0
Therefore there is a negetive exponent on the x^3, is that why?
4d) y= 3^x-1 - 11
(how do u know this isnt?)
g) [sqrtofentireterm] 3x^3-5x
Why is that not a polynomial function?
Thnx 4 the help!
1 Answer
- Ian HLv 710 years agoFavorite Answer
From WIKI
A polynomial in variable x is an expression of finite length using only the operations of addition, subtraction, multiplication, and non-negative integer exponents.
For example, x^2 − 4x + 7 is a polynomial,
but x^2 − 4/x + 7x^(3/2) is not,
because its second term involves division by the variable x
and because its third term contains an exponent that is not a whole number.
Now apply those rules to your examples.
Regards - Ian
