(v) Which of the following is/are an Arithmetic Progression (A.P.)?
1. 1, 4, 9, 16,……….
2. √3, 2√3, 3√3, 4√3,………
3. 8, 6, 4, 2,………
(a) only 1.
(b) only 2.
(c) only 2. and 3.
(d) all 1., 2. and 3.

Solution