If the ratio of the sum of two a.p is (7n+1 ):(4n+1) then find the ratio of their 9th term
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Answer:
answer is 2:3
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nazishhakhter31:
plz give the whole solution to solve it
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Step by step explanation :
in photo
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Why you replace n by 17..
I m not able to understand this
because we need 9th term
Why u had take n-1/2..
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