Question

Can someone help solve this?...

Answer 1

I think its the last one, but they tell me its not

Answer 2

its the last one.

Answer 3

do you understand why?

Answer 4

@Vodka97 yes i understand, but some people on here were telling me it was incorrect

Answer 5

The answer is 3 undefined

Answer 6

do you know how to write the order of a matrix?

Answer 7

@rajee_sam so its not the last one?

Answer 8

NO.

Answer 9

humm.

Answer 10

@rajee_sam @Vodka97 lol see im confused

Answer 11

The order of the matrix is written as ( No. of Rows X No. of Columns). For example the A Matrix has 3 rows and 1 column. So its order is 3 X 1. Similarly the order of B is 2X3. Order of C is 1 X 3 and of D is 3 X 3. So to multiply all of them. You would take two matrices at a time. To be able to multiply Matrix A and B, the no. of Columns of A should be equal to No. of Rows of B. Which is not in this case. So you cannot multiply A and B.

So let us Keep A as it is and try and multiply B and C. The no. of Columns of B should Match No. of Rows of C. Which is not same again. So I cannot multiply B and C either.

Now consider C and D. Here the No. of Columns of C matches the No. of Rows of D. So I can multiply C and D and the resultant Matrix will be of the Order 1 X 3 which is the No. of Rows of C X No. of Columns of D. So if I multiply the resultant with B I still cannot. So The product is undefined.

Answer 12

As am i. How did you get 3?

Answer 13

@Vodka97 i think he meant the third answer

Answer 14

iknow. but howd he get that.

Answer 15

Read my explanation pl.

Answer 16

@rajee_sam ohhhhhhh ok i see

Answer 17

@rajee_sam theres a rule for that right?

Answer 18

@rajee_sam thanks man! :D

Answer 19

So to multiply 2 Matrices, b4 you get into the work do the simple check if they can be multiplied or not. It will save you the trouble, because Matric multiplication is Boooooring..

Answer 20

yes that is the rule. If you say A times B in Matrix the order cannot be changed. You have to write A first and then B. Then you check if No. of columns of A is equal to the No. of Rows of B. If not then they cannot be multiplied.

Answer 21

Did they say your answer is right now?

Answer 22

whoever "They " is>>>

Answer 23

kkk