1.

23rd term of an arithmetic sequence is 32. 35th term is 104. Thena. What is the common difference?b. Which is the middle term of first 35 terms of this sequence?c. Find the sum of first 35 terms of this sequence.

Answer»

a. 23rd term = 32

35th term = 104

x23 + 12d = x35

12d = 104 - 32 = 72

d = 6

b. Middle term offirst 35 terms = \(\sqrt{4}\)

c. 18 th term = X19 = X23 – 5d = 32 -5 × 6 = 32 – 30 = 2

Sum of 35 terms = 18th term × 35 = 70



Discussion

No Comment Found

Related InterviewSolutions