Question

a power p-q x a power q-r =1​

Answer 1

Step-by-step explanation:

${a}^{p - q} \times {a}^{q - r} = {a}^{p - q + q - r} = {a}^{p - r}$

${a}^{p - r} = 1 = {a}^{0}$

so

p-r=0

and So p=r