Sagot :
Answer:
n = 15
Step-by-step explanation:
An = a1 + ( n - 1 ) d
25 = -3 + ( n - 1 ) 2
25 = -3 + 2n - 2
25 = - 5 + 2n
25 + 5 = 2n
2n = 30
n = 15
Answer:
n = 15
Step-by-step explanation:
An = a1 + ( n - 1 ) d
25 = -3 + ( n - 1 ) 2
25 = -3 + 2n - 2
25 = - 5 + 2n
25 + 5 = 2n
2n = 30
n = 15