Question

Dada a função f(x)= 1/4x² + 3x + 6. Determine: a) f(-2) b) f(1/2) c) f(0,5)

Answer 1

a) f(-2)=1/4.(-2)^2 + 3.(-2) +6
f(-2)=1/4.(4)-6+6
f(-2)=1
b) f(1/2)=1/4.(1/2)^2+3.(1/2)+6
f(1/2)=1/4.(1/4)+3/2+6
f(1/2)=1/16+(3+12)/2
f(1/2)=(1+15.8)/16
f(1/2)=(1+120)/16
f(1/2)=121/16
c) como 0,5=1/2 entao eh so vc fazer igual na letra b.