Advertisements
Advertisements
Question
If A = diag (2 − 59), B = diag (11 − 4) and C = diag (−6 3 4), find: A − 2B
Sum
Advertisements
Solution
Here,
`A = [[2 0 0],[0 -5 0],[0 0 0]]`
`B=[[1 0 0],[0 1 0],[0 0 -4]]`
`A - 2B`
⇒A−2B= `[[2 0 0],[0 -5 0],[0 0 9]]` -2` [[1 0 0],[0 1 0],[0 0 -4]]`
⇒A−2B= `[[2 0 0],[0 -5 0],[0 0 -8]]`-`[[2 0 0],[0 2 0],[0 0 -8]]`
⇒A−2B=`[[0 0 0],[0 -7 0],[0 0 17]]`=diag (0 −7 17)
shaalaa.com
Is there an error in this question or solution?
