Question

253,248,243, find the 49th term.

Answer 1

13

Explanation:

the difference is -5

• nth=a+(n-1)d
• a=253,n=49,d=5
• 253+(49-1)×-5
• 253+48×-5
• 253+(-240)
• 253-240=13

the 49th term is 13