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anonymous

  • one year ago

please help :) these polynomials? A. f(x)=3x+(4/3)x^3-7 B. g(x)= -5x^3+x-3/x C. h(x)= x^3sqrt5+x-3 D. k(x)= 25x^2-x^3+x^5

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  1. anonymous
    • one year ago
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  2. blackstreet23
    • one year ago
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    a polynomial is any variable with a positive exponent

  3. blackstreet23
    • one year ago
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    \[3x^5\] is a polinomial

  4. anonymous
    • one year ago
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    I got no for that bc of the fraction but im not sure haha

  5. blackstreet23
    • one year ago
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    \[3\sqrt{x} \] or \[3x^(1/2)\] are not polinomials

  6. blackstreet23
    • one year ago
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    i am sorry, not just positive exponent, the exponent has to be a positive integer

  7. blackstreet23
    • one year ago
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    so the previous ones are not polinomials

  8. anonymous
    • one year ago
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    so is 2 yes 3 and 4 no and 5 yes?

  9. blackstreet23
    • one year ago
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    give me a sec

  10. blackstreet23
    • one year ago
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    2 is yes

  11. blackstreet23
    • one year ago
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    3 is no because \[3/x\] is the same as \[3x^(-1)\]

  12. blackstreet23
    • one year ago
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    4 is yes

  13. anonymous
    • one year ago
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    why is 4 yes?

  14. blackstreet23
    • one year ago
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    because whatever the coeficients are does not really matters

  15. blackstreet23
    • one year ago
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    we just care about the variables having positive integers

  16. blackstreet23
    • one year ago
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    get it?

  17. blackstreet23
    • one year ago
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    and finally 5 is yes

  18. anonymous
    • one year ago
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    okay i get it! thank you :)

  19. blackstreet23
    • one year ago
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    for the same reason

  20. blackstreet23
    • one year ago
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    no problem :)

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