Question

упростите 1-b^-1+b^-2/1-b+b^2

Answer 1

1) 1 - ( b ^ - 1 ) + ( b ^ - 2 ) = 1 - ( 1 / b ) + ( 1 / b ^2 ) = ( b^2 - b + 1 ) / b^2
2) ( ( b^2 - b + 1 ) / b^2 ) / ( 1 - b + b^2 ) = 1 / b^2 = b ^ - 2
Ответ b ^ - 2