Odpowiedź :
Odpowiedź:
f(x) = (5x - 3) : 2
n - jeden argument
n + 4 - drugi argument
Róznica argumentów = n + 4 - n = 4
f(n) = (5 * n - 3) : 2 = (5n - 3) : 2
f(n + 4) = [5(n + 4) - 3]/2 = (5n + 20 - 3)/2 = (5n + 17) : 2
f(n + 4) - f(n) = (5n + 17 - 5n + 3) : 2 = 20 : 2 = 10 c.n.w
Odpowiedź:
[tex]f(x)=\frac{5x-3}{2}[/tex]
Wiemy, że :
[tex]x_{1} -x_{2} =4[/tex]
[tex]f(x_{1} )-f(x_{2} )=\frac{5x_{1}-3 }{2} -\frac{5x_{2}-3 }{2} =\frac{5x_{1} -3-(5x_{2}-3) }{2} =\frac{5x_{1}-5x_{2} }{2} =\frac{5(x_{1}-x_{2}) }{2} =\frac{5 \cdot 4}{2} =\frac{20}{2} =10[/tex]
C.B.D.O