The sum of the first two terms of a G.P. is −4 and the fifth term is 4 times the third term. Then, the first term of the G.P. is :

1. $-\dfrac{3}{4}$ or 4

2. $\dfrac{3}{4}$ or $\dfrac{1}{4}$

3. $\dfrac{4}{3}$ or $\dfrac{1}{4}$

4. $-\dfrac{4}{3}$ or 4

If x, y and z are in G.P., then the relation between x, y and z can be :

1. y = x + z

2. y = xz

3. 2y = x + z

4. $y = \sqrt{xz}$

If 5th, 8th and 11th terms of a G.P. are x, y and z respectively, then which one of the following is correct?

1. y² = x²z²

2. y² = x² + z²

3. y² = xz

4. xyz = 1

Consider the G.P. a, ar, ar², …….., l. The kth term from the end is :

1. $\dfrac{l}{r^{k-1}}$

2. $\dfrac{l}{k}$

3. $\dfrac{al}{r^k}$

4. $\dfrac{l}{ar^{k-1}}$