Question

Let * be a binary operation, on the set of all non-zero real numbers, given by `a** b = (ab)/5` for all a,b∈ R-{0} that 2*(x*5)=10

Answer 1

It is given that a*b=`(ab)/5`, where and

Using a*b= `(ab)/5 ` in the equation , we get:

2* `((5x)/5)=10`          (∵ x*5=5x)

  ⇒2*x=10
`⇒(2x)/5=10`
  ⇒x=25

∴ The value of x is 25.