1) 2 ^16 - 2^18 + 2^19 = 2^16 • ( 1 - 2^2 + 2^3 ) = 2^16 • ( 1 - 4 + 8 ) = 2^16 • 5
2) 16^4 - 16^6 = 16^4 • ( 1 - 16^2 ) = ( 2^4 )^4 • ( 1 - 256 ) = 2^16 • ( - 255 ) = 2^16 • 5 • ( - 51 )
3) ( 2^16 • 5 ) : ( 2^16 • 5 • ( - 51 )) = - 1/51
Ответ ( - 1/51 )