4 years ago

Which of the following is a diagonal matrix?

Mathematics

2 answers:

IRINA_888 [86]4 years ago

5 0

A matrix is diagonal if

$i\neq j \implies A_{i,j}=0$

In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.

xxTIMURxx [149]4 years ago

5 0

Answer:

Option 3

Step-by-step explanation:

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3 years ago

1. What is the area of the triangle below? 10 in. 7 in.

Alex787 [66]

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3 years ago

Read 2 more answers

PLEASE HELP ME OUT...

katrin2010 [14]

Answer:

$area = 144\pi$

Step-by-step explanation:

$volume = \frac{4}{3} \pi {r}^{3} \\ \\ 288\pi = \frac{4}{3} \pi {r}^{3} \\ \\ 3(288\pi) = 4\pi {r}^{3} \\ \\ \frac{3(288\pi)}{4\pi} = {r}^{3} \\ \\ 216 = {r}^{3} \\ \\ r = \sqrt[3]{216} \\ r = 6$