Q8 of 123 Page 3

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

The given binary operation is a*b =

We have to find the value of x so that 2*(x*5) = 10


Firstly, x*5 = = x


Now 2*(x*5) = 2*x =


As per the question, it is equal to 10


∴ = 10


∴ x = 25


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