Question

1. IfA = [ 3 −9 −4 7 ], find A + A′ .
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Answer 1

______Answer _______

given that a:b=4:7 & b:c=5:6

We have to calculate a:b:c

Thus a:b:c

=> (a*b):(b*b):(b*c)

=>(4*5):(7*5):(7*6)

=>20:35:42