Question

solve these question

Answer 1

In first question

Observe the first value which is written in the question in your question it is 3 and that's what is the first term of an ap

Now four common difference you have to subtract the second term from the first term it means subtract 1 from 3

Respecting one from 3 we get -2 it is the common difference of the AP

And now a second question is solved in the attachment

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