Question

when any variable of power zero then variable value 1. why?

Answer 1

because zero is not a multyplicable power.
hence if you write 3^0=1 ,4^0=1..... and so on.

hope the answer was fruitful

Answer 2

Hey!
Any variable of power is 0 than value is 1
because,
Let any no.
such as...
3^-3=(-3)*(-3)*(-3)
=then here 1 is constant
so,1*(-3)*(-3)*(-3)
=1*-27=-27
so, any variable of power is 0 then,
2^0=1* zero times 2
so, 1 is Ans
any other e.g.
2^2=1* 2 is two times
so, 1*2*2=4
hope it helps you