Question

If 4 times the fourth term of anA.P.is equal to 18 times its 18th term, then find its 22nd term ?

Answer 1

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If 4 times the fourth term ...

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If 4 times the fourth term og an AP is equal to 18 times its 18th term find its 22 term

 

Posted by Praveen Chauhan 1 year, 9 months ago

  CBSE > Class 10 > Mathematics

1 answers

Payal Singh 1 year, 9 months ago

Solution: let first term = a

common difference = d

ATQ.

=> 4a4= 18a18

=> 4 (a+3d) = 18(a+17d)

=> 4a + 12d = 18a + 306d

=> 14a - 294d = 0

divide by 14

=> a+21d = 0

=> a+(22-1)d =0

=> a22 = 0

so 22th term is 0

Hope it's help you ✌️ ✌️ ✌️ ✌️.................

Answer 2

Refers to attachment ☻☻