Question

simplify: x(to the power)a-b. x(to the power)b-c. x(to the power)c-a

Answer 1

x^a-b.x^b-c.x^c-a
Base is same so powers will be added
[a^m.a^n=a^m+n]
so, x^(a-b+b-c+c-a)
=x^0
=1
Hope it helps u...^_^

Answer 2

The weighing machine measures this apparent weight and hence the mass indicated by it is less than the actual mass. Our actual mass will be more than 42 kg.