Răspuns:
Explicație pas cu pas:
A(1,2) ∈ Gf => f(1)=2 => a-2=2 => a=4
b) f(x) = 4x-2
x=0=>f(x) = -2
f(x)=0 => x=1/2
scriem aria in doua moduri
A=[tex]\frac{c1*c2}{2} = \frac{\frac{1}{2}*2 }{2}=\frac{1}{2}[/tex]
A=[tex]\frac{h*ip}{2} => \frac{1}{2} = \frac{h*\frac{\sqrt{17} }{2} }{2} => h*\sqrt{17} =2 => h=\frac{2}{\sqrt{17} }[/tex]
