Question

CMR  4^n+3+4^n+2-4^n-1-4^n chia hết cho 300

giai giup mk nhé.thanks

 

Answer 1

4ⁿ⁺³ + 4ⁿ⁺² - 4^n-1 - 4ⁿ 

= 4ⁿ( 4^3 + 4^2 - 4 - 1 )

= 4ⁿ . 75

= 4^n-1 . 4 . 75

= 4^n-1 . 300

=> đpcm