charethafoster
05.07.2019 •
Mathematics
Whether the given function is a polynomial function. k(x) = –3x6 – 0.7x + x3
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Ответ:
Yes, it is.
Step-by-step explanation:
A polynomial is one term or a sum of terms. A term is a single number or a number multiplied by one of more variables.
-3x^6 is a term since it is made up of a number, -3, called a coefficient, and many variables. The x is to the 6th power, so there are 6 factors of x.
-0.7x is also a term since it is made up of a coefficient, -0.7, and one variable, the x.
Finally, x^3 is also a term since it is the coefficient 1 multiplied by x^3.
Since the right side of the function is the sum of terms, it is a polynomial. The function is thus a polynomial equation.
The degree of a term is the sum of the exponents of all the variables of the term. Remember that a variable by itself is the same as the variable raised to the 1st power and has degree 1. The degree of a polynomial is the same as the degree of the term with highest degree.
-3x^6 has degree 6
-0.7x has degree 1
x^3 has degree 3
Since the highest degree of all terms is 6, the entire polynomial is of of degree 6.
Ответ:
explanation: the numbers are going up +5 every time