Question

(3^52-3^51-3^50):(9^50•25)

Answer 1

=3^50*5:3^100:5^2=3^-50*5^-1

Answer 2

= 3⁵⁰ ( 3²  - 3¹  -1) : [(3²)⁵⁰ ·25 ] 
= 3⁵⁰ ( 9 - 3 -1) : (3¹⁰⁰ ·25) 
= 3⁵⁰ 5 : ( 3¹⁰⁰ ·25) 
= 3⁵⁰ :3¹⁰⁰  ·5 : 25
= 3⁻⁵⁰ · 1 /5 
=3⁻⁵⁰ / 5
= 1 / 5· 3⁵⁰