Question

Bahiense - 2014 Calcule o valor numérico da expressão algébrica

Answer 1

x=(4/0,2)^(-1)

x=(40/2)^(-1)

x=20^(-1) =1/20

y=4

2x²+y^(-1)

=2*x²+1/y

=2*(1/20)² + 1/4

=2*1/400 +1/4

=1/200 +1/4

=1/200+50/200

=51/200

=0,255