Question 63422

(2^n)(2^(n+2))(2) 

= 2^(n+n+2+1)  [while multiplying we add the exponents]

= 2^(2n+3)


(ii) 5^(x+1) * 5^(1-x)
  
= 5^(x+1+1-x)

= 5^2

= 25


Good Luck!!!