## Katieann16 Group Title Which of the following are polynomials. one year ago one year ago

1. Katieann16 Group Title

$A) x^5+x-\frac{ 1 }{ 4 } B)-4c^2-\frac{ 5 }{ c } C)5y+\sqrt{y}+7 D) -2t^4-6t+$

2. Katieann16 Group Title

@jim_thompson5910

3. Katieann16 Group Title

@Mathmuse

4. Mathmuse Group Title

I cheated and went to wikipedia but the definition is good "a polynomial is an expression of finite length constructed from variables (also called indeterminates) and constants, using only the operations of addition, subtraction, multiplication, and non-negative integer exponents." pay particular attention to the the very last qualifier of the quote

5. Katieann16 Group Title

@mathstudent55

6. Mathmuse Group Title

Which exponents are not integers in the expressions you listed?

7. Katieann16 Group Title

A & B?

8. Mathmuse Group Title

in a) the exponents on you x variable are 5, and 1. both integers in b) the exponents on the c variable are 2, -1. both integers, but one negative. this does not fit the description of a polynomial

9. Mathmuse Group Title

identify the exponents in c) and d)

10. Katieann16 Group Title

So A is one and C?

11. Katieann16 Group Title

So,A,C,D

12. Katieann16 Group Title

A & D

13. Mathmuse Group Title

right, the exponent of a square root is 1/2, not an integer

14. Katieann16 Group Title

thank you

15. Mathmuse Group Title

while the exponents in d) areall positive and integers