The nth term of the G.P. x³, x⁵, x⁷, …….. is :

1. x^{(2n - 1)}

2. x^{(2n + 3)}

3. x^{(2n + 1)}

4. x^{3n + 2}

The 10th term of the G.P. 1, −a, a², −a³, …….. is :

1. a⁹

2. −a¹⁰

3. −a¹¹

4. −a⁹

Which term of the G.P. 2, 8, 32, 128, …….. is 131072?

1. 9th

2. 10th

3. 8th

4. 12th

If the 5th term of a G.P. is 2, then the product of its first nine terms is :

1. 256

2. 1024

3. 512

4. 2048