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Matrix !
If A = [ 0 2 ] , kA = [0 3a ] whatz value of k , a & b
3 -4 2b 24
please show how !
thanks

5 Answers

is left hand side and right hand side equal in a matrix.............

well tormented ,

two matrices are equal if and only if they r of smae order and then corresponding elements are equal.

from this we get 2k=3a
3k=2b
-4k=24

that was my doubt b555,.............r they equal in all cases,..........

A = [ 0 2 ]
3 -4

kA=[ 0 3a ]
2b 24

i.e. k[ 0 2 ] = [ 0 3a ]
3 -4 2b 24
[0 2k] =[0 3a]
3k -4k 2b 24
using equality of matrices
-4k=24
k=-6

and 2k=3a
2*-6=3a
a=-4

similarly b=-9

Thnx a lot !

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