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3 years ago

What is the dimension of this matrix?

Mathematics

2 answers:

UNO [17]3 years ago

7 0

Answer:

4 by 3 matrix.

Step-by-step explanation:

In the matrix, there are 4 rows of numbers and 3 columns of numbers.

Allushta [10]3 years ago

7 0

4 rows three columns so 4 by 3 matrix

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notka56 [123]

Answer:

$f^{-1}(8)=\frac{3}{2}$

Step-by-step explanation:

Given f(x)= $2x+5$

We have to find $f^{-1}(8)$

In order to find $f^{-1}(x)$ we have to make x as the subject of the formula

Let us assume f(x)=y

⇒ $2x+5=y$

Subtracting both sides by 5

$2x+5-5=y-5$

$2x=y-5$

Dividing both sides by 2

$\frac{2x}{2}=\frac{y-5}{2}$

⇒ $x=\frac{y-5}{2}$

Now substituting y with x

we have $f^{-1}(x)=\frac{x-5}{2}$

Now $f^{-1}(8)=\frac{8-5}{2}$

= $\frac{3}{2}$

So option (ii) is correct

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ludmilkaskok [199]

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