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crimeas [40]
3 years ago
13

HELP QUICK TIMED!!!!!!Drag the expressions into the boxes to correctly complete the table.

Mathematics
2 answers:
ValentinkaMS [17]3 years ago
5 0

Answer:

The following expressions are polynomials:

3x^2-5x^4+2x-12

x^5-5x^4+4x^3-3x^2+2x-1

x^3-7x^2+9x-5x^4-20

The following expressions are not polynomials:

\frac{4}{x^4}+\frac{3}{x^3}-\frac{2}{x^2}-1

x^{-5}-5x^{-4}+4x^{-3}-3x^{-2}+2x^{-1}-1

\sqrt[4]{x}-\sqrt[3]{x}+4\sqrt{x}-8x+16

Step-by-step explanation:

We are required to differentiate the expressions as polynomials and non-polynomials.

Since, we know,

A polynomial is an expression that involves variables and their coefficients separated by mathematical operations with the variables having non-negative integer values.

i.e. A polynomial is of the form, a_{n}x^{n}+a_{n-1}x^{n-1}+.....+a_{1}x+a_{0}, with 'n' being non-negative integer.

Thus, according to the definition, we have that,

The following expressions are polynomials:

3x^2-5x^4+2x-12

x^5-5x^4+4x^3-3x^2+2x-1

x^3-7x^2+9x-5x^4-20

The following expressions are not polynomials:

\frac{4}{x^4}+\frac{3}{x^3}-\frac{2}{x^2}-1

x^{-5}-5x^{-4}+4x^{-3}-3x^{-2}+2x^{-1}-1

\sqrt[4]{x}-\sqrt[3]{x}+4\sqrt{x}-8x+16

a_sh-v [17]3 years ago
3 0
To qualify as a polynomial, the expression in question:
* Consists of one or more terms 
* Variables are only with positive whole exponents
* No variables in the denominator of any term. 


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Answer:

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Step-by-step explanation:

Recall the general equation for a straight line is

y = mx + b

where m is the gradient and b is the y-intercept

given 2 points whose coordinates are (x1, y1) and (x2, y2), m can be found with the following formula:

m = \frac{y1-y2}{x1-x2}

in this case, x1 = 3, y1 = -1, x2 = 6, y2=1

applying these values to the formula for m will give

m =  (-1 -1) / (3-6) = 2/3

We can see immediately that only the first (top-most) answer has this value for m and we can guess that this is probably the answer.

But we can still check to confirm:

If we substitute this back into the general equation, we get:

y = (2/3)x + b

In order to find the value for b, we substitute any one of the 2 given points back into this equation. Lets choose (6,1)

1 = (2/3)(6) + b

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Confirm  Y = 2/3x - 3 is the answer.

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Step-by-step explanation:

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