Solution - Power equations

Step  1  :

Equation at the end of step  1  :

  
 Step  2  :

Equation at the end of step  2  :

Step  3  :

            72
 Simplify   ——
            76

Dividing exponents :

 3.1    7²   divided by   7⁶   = 7^{(2 - 6)} = 7^(-4) = ¹/_7⁴

Final result :

    1            
  ———— = 0.00042 
  2401