How many terms are there in 2, 4, 8, 16,..., 2048?
Choose the correct choice.
A) 14 B) 11 C) 12 D) 10 E) 8
2, 4, 8, 16, ...,2048 is a G.P with a =2   and r =4/2= 
<gadget id="calculator">4/2</gadget>
<output>2</output>
2   Let the number of terms be n. Then   2 x 2 ^n-1= 2048   or 2^n-1 = 1024= 2^10   Thus n - 1 =10   n= 11   ANSWER:11
<result>B</result>
How many terms are there in 2, 4, 8, 16,..., 2048?