Jawabanmu

2014-03-10T20:58:59+07:00
X = - 80
Maaap klo slah,, :D
caranya??
2 - 4 + 8 = 6 ,,,,
= -86 + 6 = x= -80
2014-03-10T21:04:57+07:00
Un = a + (n-1) b
-86 = 2 + (n-1) -2
-86 = 2 - 2n + 2
-86 = 4 - 2n
-82 = - 2n
41 = n
ada 41 suku
45 = n
jadi ada brp suku ??
45
oke makasih yaa :)
iya sama2 :)