Question

First four terms of an A.P., are ______ whose first term is –2 and the common difference is –2.

Options

• – 2, 0, 2, 4

• – 2, 4, – 8, 16

• – 2, – 4, – 6, – 8

• – 2, – 4, – 8, – 16

Answer 1

First, four terms of an A.P., are – 2, – 4, – 6, – 8 whose first term is –2 and the common difference is –2.

Explanation:

Let the first four terms of an A.P are a, a + d, a + 2d and a + 3d

Given that the first term is – 2 and difference is also – 2, then the A.P would be:

– 2, (– 2 – 2), [– 2 + 2 (– 2)], [– 2 + 3(– 2)]

= – 2, – 4, – 6, – 8