Is 0 a term of the AP 31, 28, 25, …? Justify your answer.

Is 144 a term of the A.P. 3,7,11,…………? Justify your answer.

Is 'zero' a term of the Arithmetic Progression 31, 28, 25, ….? Justify your answer.

Define the term 'resolving power of a telescope'. How will the resolving power be affected with the increase in Diameter of the objective lens? Justify your answer.

Is it true to say that a_n= 3n^(2) + 5 is the n^(th) term of an A.P. sequence? Justify your answer.

For an arithmetic sequence 22,26,30,..... Can the difference between any two terms of this sequence be 50. Justify your answer ?

Which of the following form an A.P. ? Justify your answer. 0,2,0,2,...

Which of the following form an A.P. ? Justify your answer. -1,-1,-1,-1,...