Question

am nevoie de ajoutor va rog​

Answer 1

Răspuns:

1. f(x) = ax + 3

A(1 ; 5) ∈ Gf daca

f(1) = 5      }

f(1) = a*1 + 3 }   =>

a + 3 = 5

a= 5 -3 = 2

2. La intersesectia cu axa abciselor ( axa OX ) y = f(x) = 0

f(x) =0

f(x) = 3x-6 =>

3x -6 = 0

3x = 6

x = 2  => coordonatele (2 ; 0)

3. f(x) = -3x +4

M(a ; -2) ∈ Gf daca

f(a) = -2           }

f(a) = -3a + 4   }  =>

-3a + 4 = -2  | (-1)

3a = 6

a = 2 => M(2, -2)