Question

First term of an arithmatic sequence is 8 and common difference is 5. Find its 20th terms

• A. 98
• B. 103
• C. 111
• D. 87

Answer 1

Answer:

B. 103

a=8 d=5 Xn = a + (n-1)d X20 = 8 + (20-1) x 5 = 8 + 19 x 5 = 8 + 95 = 103