Respuesta :

ghopk3
sub n=1
f(1+1) = f(1)-2 = 18
f(1) = 20
f(2) - f(1) = -2 , d=-2
f(5) = 20+d*(n-1) = 20+(-2)*(5-1) = 20-8 = 12

Answer:

real anwser is 10

Step-by-step explanation:

toom the test

Otras preguntas