anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
blackstreet23
  • blackstreet23
a polynomial is any variable with a positive exponent
blackstreet23
  • blackstreet23
\[3x^5\] is a polinomial

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anonymous
  • anonymous
I got no for that bc of the fraction but im not sure haha
blackstreet23
  • blackstreet23
\[3\sqrt{x} \] or \[3x^(1/2)\] are not polinomials
blackstreet23
  • blackstreet23
i am sorry, not just positive exponent, the exponent has to be a positive integer
blackstreet23
  • blackstreet23
so the previous ones are not polinomials
anonymous
  • anonymous
so is 2 yes 3 and 4 no and 5 yes?
blackstreet23
  • blackstreet23
give me a sec
blackstreet23
  • blackstreet23
2 is yes
blackstreet23
  • blackstreet23
3 is no because \[3/x\] is the same as \[3x^(-1)\]
blackstreet23
  • blackstreet23
4 is yes
anonymous
  • anonymous
why is 4 yes?
blackstreet23
  • blackstreet23
because whatever the coeficients are does not really matters
blackstreet23
  • blackstreet23
we just care about the variables having positive integers
blackstreet23
  • blackstreet23
get it?
blackstreet23
  • blackstreet23
and finally 5 is yes
anonymous
  • anonymous
okay i get it! thank you :)
blackstreet23
  • blackstreet23
for the same reason
blackstreet23
  • blackstreet23
no problem :)

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