Question

Va rooog!!! DAU COROANA!!!
Determinați a apartine R stiind ca graficul functiei f: R ->, f(x) = ax+ 3 intersecteaza axa OX in punctul P(2;0)

Answer 1

[tex]f: R \rightarrow R, f(x) = ax+ 3\\~ G_f = \{(x,f(x)):x \in R\}\\~ Oy = \{(y,0):y\in R\}\\~ Gf \cap Oy = \{(x,f(x)):x\in R, f(x) = 0\}\\~ P(2,0) \in G_f \cap Oy \implies f(2) = 0\\~ a*2+3 = 0\\~ a*2 = 3\\~ a = \frac{3}{2} = 1.5[/tex]