Question

solve this question with detail

Answer 1

since its multiplication therefore all the power of x will add up

power of x will be =  2/7+2/5-9/7+3/5=(10+14+21-45)/10

=0/10=0

power of z will be=-1/2+2/3+2/3-5/6=0

therefore it will be

x^0/z^0=1/1=1