" 20.Find the common difference of the A.P whose first term is "12" and fifth term is "0" ."

Write the expression for the common difference of an A.P. whose first term is a and n t h term is b .

Find the common difference of an A.P. whose first term is 100 and the sum of whose first six terms is five times the sum of the next six terms.

Find the common difference of an A.P. whose first term is 5 and the sum of its first four terms is half the sum of the next four terms.

Find the common difference of an A.P. whose first term is 5 and the sum of its first four terms is half the sum of the next four terms.

Find the common difference of an A.P. whose first term is 5 and the sum of its first four terms is half the sum of the next four terms.

Find the nth term of AP whose first term is 12 and common difference is 7.

Find the mean of first n terms of an A.P. whose first term is a and common difference is d.

Find the n^(th) term of an A.P. Whose first term is 200 and common difference is 7 .

Write an A.P. whose first term is 0..6 and the common difference 0.3.

Find first four terms of an A.P. , whose first term is -6 and common difference is +6 .