Question

Which term of the arithmetic progression 5,13, 21...... is 181?

• A. 20th
• B. 21st
• C. 22nd
• D. 23rd

Answer 1

Answer:

D. 23rd

a=5,d=8,Xn=181 Xn = a+(n-1)d 181=5+(n-1)8 181=8n-3 184=8n n=23