Homework SourseWrite the formula for the sequence below 3 13 23 Whats the 9
Write the formula for the sequence below:
3, 13, 23,....
What\'s the 9th term?
Write the formula for the sequence below:
3, 13, 23,....
What\'s the 9th term?
3, 13, 23,....
What\'s the 9th term?
Solution
Solution:
3 , 13, 23
a2-a1 = 13-3 = 10 =d
a3-a2= 23-13 = 10 =d
since common difference is same therefore it is an AP
An = a + (n-1)d
An= nth term
a = first term
d = common difference
and n= number of terms
plug all the values a= 3 and d 10
An= 3 + (n-1) *10
Requred formula
9th term
put n= 9
A9 = 3 + (9-1) x10
A9 = 3 + 80
A9 = 83
Answer
