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If 9 times the 9th term …

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If 9 times the 9th term of an A.P is equal to13 times the 13 term .then find the 22nd term of the ap

Posted by Prem Shankar 5 years, 10 months ago

CBSE > Class 11 > Mathematics

3 answers

Shrejal Gupta 5 years, 10 months ago

Btw no information is missing here

Shrejal Gupta 5 years, 10 months ago

9(a+8d)=13(a+12d) on solving this equation we get 4a+84d=0,in next step taking 4 as common we get a+21d=0 - (1) then the 22nd term=0 [from (1)]

Ashtrix Official 5 years, 10 months ago

9( a + 8d ) = 13 ( a + 12d ) Oke information is missing in question . You will have 2 equations and you can calculate then .

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