Question

va rog ajutati mafff​

Answer 1

Explicație pas cu pas:

$f(x) = ax + 5 \ \ , \ \ A(2;-3) \in G_{f}$

$x = 2 \implies f(2) = -3$

$2a + 5 = -3 \\ 2a = - 3 - 5$

$2a = - 8 \implies a = - 4$

Answer 2

$\displaystyle f:\mathbb{R}\rightarrow \mathbb{R},~f(x)=ax+5,~a=?\\\\ A(2,-3)\in G_f \Rightarrow f(2)=-3 \Rightarrow a \cdot 2+5=-3 \Rightarrow 2a=-3-5 \Rightarrow \\\\ \Rightarrow 2a=-8 \Rightarrow a=-\frac{8}{2} \Rightarrow a=-4$