Question

Which sequence is a geometric progression?
A 2 4 6 8
B 1 1 2 3
С 1 2 4 8
D 1 3 5 7

Answer 1

Answer:

c) 1 2 4 8

Step-by-step explanation:

Explanation :-

Geometric sequence

The sequence is of the form a , a r , a r² , a r³ ,.......

'a' is the first term

'r' is the common ratio

1 , 1(2) , 1( 2)² , 1( 2 )³ ......  is a geometric sequence

here a = 1

common ratio   $r = \frac{a_{2} }{a_{1} } = \frac{2}{1} = 2$

                        $r = \frac{4}{2} = 2$

                       $r = \frac{8}{4} = 2$

The sequence 1 2 4 8 is a geometric sequence