Jawapan

2016-03-16T19:36:38+08:00
Tn = a + (n-1) d

Tn = 10
a= -2 ,
d= 1 - (-2)
d= 3

-2 + (n-1) 3 = 10
3n - 3 = 12
3n = 15
n = 5