Question

if 21 = a-b = - 3 are in AP , find the value of a+b ​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

a= 21 =d eqn where do is common of a b-a=d eqn 2 -3 -d eqb 3 Rhs of eqn 1and 3 are same a- 21= -3-b so a+b=3+21=18