Question

va rog mult
ofer 20 de puncte​

Answer 1

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=$\frac{c1*c2}{2} = \frac{\frac{1}{2}*2 }{2}=\frac{1}{2}$

A=$\frac{h*ip}{2} => \frac{1}{2} = \frac{h*\frac{\sqrt{17} }{2} }{2} => h*\sqrt{17} =2 => h=\frac{2}{\sqrt{17} }$