Question

4^n+4^n+1+4^n+2
ajutor va roog

Answer 1

4^n+4^n+1+4^n+2 = 4^n(1+ 4 + 4^2 ) = 4^n ( 1+4+16) =4^n x 21  

Answer 2

$4^n+4^{n+1}+4^{n+2} \\ \\ =4^n+4^n\cdot4^1+4^n\cdot4^2 \\ \\ =4^n(1+4^1+4^2) \\ \\ =4^n(1+4+16) \\ \\ =4^n\cdot21$