Question

if the common difference of an A.P. Is 5 then a30-a20 is​

Answer 1

a20=19d  

a15=14d then a20-a15d=5d ;

As per sum a20-a15=5 (3)

Therefore a20-a15=15

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Answer 2

Answer:

ans is 50

Step-by-step explanation:

ans will be 50 bcz a will be eliminated