2a-b,4a-3b,6a-5b  are in A.P or G.P


consecutive terms of ap differs by a common difference D
D=4a-3b-(2a-b)=2a - 2b
D=
6b-5b-(4a-3b) =2a - 2b
​hence it is an AP

 

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ckgh
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ok sure
 
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It is an Arithmetic Progression. 
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fhj
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how it is A.P
give clear explanation i will give you thumbs up
 
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