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torisob [31]
3 years ago
11

Select the correct answer. What is the domain of the function f(x) = 4x − 16? all real numbers all positive real numbers all pos

itive real numbers except 4 all positive real numbers except 16
Mathematics
2 answers:
bagirrra123 [75]3 years ago
8 0
Hello!

Since the function has no undefined points or domain constants the answer is all real numbers

The answer is all real numbers

Hope this helps!
nekit [7.7K]3 years ago
5 0
<h3>Answer:</h3>

The domain of the function f(x) is:

All real numbers.

<h3>Step-by-step explanation:</h3>

We are given a linear function f(x) in terms of the variable 'x' as:

f(x)=4x-16

Now we are asked to find the domain of the function f(x).

<em>We know that the domain of a function is the possible set of the x-values where the function is well defined that is the function does not gives a absurd result.</em>

As we know that the polynomial function i.e. here a linear polynomial function is defined all over the real axis and is also continuous there.

The graph of this linear function will be a straight line.

Hence, the domain of the given function f(x) is:

All real numbers.

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The length of a rectangle is 1 cm less than the width. The area of the rectangle is 12 cm². determine the dimensions of the rect
jarptica [38.1K]

Answer:

L= 3 cm

W= 4 cm

Step-by-step explanation:

Factors of 12:

1 and 12

2 and 6

3 and 4

Which of those is one number apart?

3 and 4

So the sides must be 3 by 4 cm.

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Suppose T is a transformation from ℝ2 to ℝ2. Find the matrix A that induces T if T is reflection over the line y=1/2x
trapecia [35]

Answer:

A = \left[\begin{array}{cc}1&\frac{4}{5}\\\frac{4}{3}&-\frac{3}{5}\end{array}\right]

Step-by-step explanation:

We have to see how the canonical vectors are transformed throught T. Lets first define T in any basis.

Since T is a reflection, then any element of the line y = x/2 if fixed by T. Therefore T(2,1) = (2,1).

On the other hand, any vector perpendicular to the line direction should be sent to its opposite value. We can take, for example, (-1,2) (note that the scalar product (2,1) * (-1,2) = -2+2 = 0). As a consecuence T(-1,2) = (1,-2). We have

  • T(2,1) = (2,1)
  • T(-1,2) = (1,-2)

By summing the first vector with the double of the second one we get, using linearity

T(0,5) = T( (2,1) + 2(-1,2)) = T(2,1) + 2T(-1,2) = (2,1) + 2(1,-2) = (4,-3)

Hence, T(0,1) = (4/5,-3/5)

Now, we take the second vector and substract it the double of the first one (to kill the second variable)

T(-3,0) = T( (-1,2) - 2*(2,1) ) = T(-1,2) -2T(2,1) = (1,-2)-2(2,1) = (-3,-4)

Therefore, T(1,0) = (1,4/3)

The matrix A induced by  T has in its first column T(1,0) and in its second column T(0,1). We conclude that

A = \left[\begin{array}{cc}1&\frac{4}{5}\\\frac{4}{3}&-\frac{3}{5}\end{array}\right]

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