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skad [1K]
3 years ago
10

What is the end behavior of the graph of the polynomial function y = 10x9 – 4x?

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

Answer:

The end behavior is to grow

Step-by-step explanation:

The first step is to identify the zeros of the function, it means, the values of x at which the function becomes zero. For achieving that, it necessary to factorize.

f(x)=10x^9-4x

f(x)=x(10x^8-4)

According to the previous, the zeros are:

  • x=0
  • x=(4/10)^{1/8}

If we replace those values in f(x), we obtain:

  • f(x=0)=0
  • f(x=(4/10)^{1/8})=0

Now, imagine the following two situations:

  • When x is extremely large with negative sign, or when x tends to -\infty: In that case, the equation would be:

f(-\infty )=-\infty (10\cdot (-\infty )^8-4)

The term (-\infty )^8/[tex] equals [tex]\infty because the sign (-) is also raised to the power 8. The equation would be:

f(-\infty )=-\infty (10\cdot (\infty )-4)

If you multiply \infty by 10 and subtract 4, the result is still \infty. The equation would be:

f(-\infty )=-\infty \cdot (\infty )

The only important thing in the previous expression is the multiplication of the signs, it means, a plus and a minus make a minus. So, f(-\infty )=-\infty, it means, THE GRAPH TENDS TO DECREASE WHEN X TENDS TO NEGATIVE INFINITIVE

  • The second situation occurs when x is extremely large with positive sign, or when x tends to \infty: In that case, the equation would be:

f(\infty )=\infty (10\cdot (\infty )^8-4)

If you multiply \infty by 10 and subtract 4, the result is still \infty. The equation would be:

f(\infty )=\infty \cdot (\infty )

The only important thing in the previous expression is the multiplication of the signs, it means, two pluses make a plus. So, f(\infty )=\infty, it means, THE GRAPH TENDS TO GROW WHEN X TENDS TO POSITIVE INFINITIVE

Thus, if you start giving arbitrary values to x, greater than (4/10)^{1/8}=0.8917, the value of f(x) becomes greater. It means that the end behavior of the graph is to grow.

Please find attached the graph of the equation

scoray [572]3 years ago
4 0

Answer:

See below.

Step-by-step explanation:

The value of the highest degree ( x^9)  is 9 - odd.

So this well rise from negative infinity on the left and rise to positive infinity on the right - or, putting it in a different way, fall to the left and rise to the right.

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