Advertisements
Advertisements
Question
Find the 35th term of AP 20, 17, 14, 11,....
Sum
Advertisements
Solution
The given AP is 20, 17, 14, 11,....
First term, a = 20
Common difference, d = 17 – 20 = –3
nth term of the AP,
an = a + (n – 1)d
= 20 + (n – 1) × (–3)
∴ 35th term of the AP,
a35 = 20 + (35 – 1) × (–3)
= 20 – 102
= –82
shaalaa.com
Is there an error in this question or solution?
Chapter 5: Arithmetic Progression - EXERCISE 5A [Page 261]
