Question

In an AP 7 times 7th term is equal to 11times 11th term.Find 18th term
​

Answer 1

Answer:

18th term of Ap is 0 .

Step-by-step explanation:

7=7a

11=11a

⇒7[a+(7−1)d]=11[a+(11−1)d]

⇒7[a+6d]=11[a+10d]

⇒7a+42d=11a+110d

⇒11a−7a+110d−42d=0

⇒4a+68d=0

⇒a+17d=0

⇒a

18

=0