Question

Is 7 term is 7 times the 7th term of an ap is equal to the 11 time is 11 find its 18th term?

Answer 1

Answer:

Step-by-step explanation:

Answer: = 0.

Step-by-step explanation:

▶ Given :-

→ 7 = 11

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▶ To prove :-

→   = 0 .

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We have,

=> 7 = 11

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=> 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.

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✔✔ Hence, it is proved ✅✅.

Answer 2

7(a+6d)=11(a+10d)

7a-11a=110d-42d

4a=-68d

4a+68d=0

a+17d=0÷4

a+17d=0

hence 18th term is zero