GeStx F(x)=(5-x)/2 и g(x)= 7-2x

1) f(3)=(5-3)/2= 1
g(3)=7-2*3= 1
1=1
f(3)=g(3)

2) f(7)= (5-7)/2= -1
g(7)= 7 - 2*7= -7
-1 > -7
f(7) > g(7)

3) f(-9)= (5-(-9))/2= (5+9)/2 = 7
g(-9)= 7-2*(-9)= 7 + 18 = 25 
25 > 7
g(-9) > f(-9)