Solution - Power equations

Step  1  :

 1.1     4 = 22

(4)² = (2²)² = 2⁴

Equation at the end of step  1  :

Step  2  :

Equation at the end of step  2  :

Step  3  :

Equation at the end of step  3  :

Step  4  :

            710
 Simplify   ———
            716

Dividing exponents :

 4.1    7¹⁰   divided by   7¹⁶   = 7^{(10 - 16)} = 7^(-6) = ¹/_7⁶

Final result :

   1                                  
  —— = 8.49986 • 10-6 
  76