If 7 times the 7th term of an ap
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if 7 times the 7th term of an AP is equal to 11 times the 11th term, show that the 18th term of it is 0
Answered by admin @
Answer: = 0.
Step-by-step explanation:
▶ Given :-
→ 7 = 11
▶ To prove :-
→ = 0 .
We have,
=> 7 = 11
=> 7( a + 6d ) = 11( a + 10d ) .
=> 7a + 42d = 11a + 110d .
=> 11a - 7a = 42d - 110d .
=> 4a = - 68d .
=> 4a + 68d = 0 .
=> 4( a + 17d ) = 0 .
=> a + 17d = 0/4 .
=> a + ( 18 - 1 )d = 0.
✔✔ Hence, it is proved ✅✅.
THANKS
#BeBrainly.
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