Odpowiedzi

2009-12-04T17:49:23+01:00
2009-12-04T17:51:47+01:00
A1 = 7
r = 4

an = a1+(n-1)r

Szukamy n dla an = 35
35 = 7+4n-4
35-7+4 = 4n
4n = 32
n = 8
2009-12-04T19:33:10+01:00