Question

What are the first 4 term of the geometric sequence with a t1=3 and tn= 2t n-1?
1.2,18,54,68
2.3,12,24,54
3.2,6,18,54
4.3,6,12,24

Answer 1

well, what would the first term be?

Answer 2

I dont know?

Answer 3

t1 = ____?

term 1 is defined as _____ ?

the first term will have to be ______?

Answer 4

3

Answer 5

yes, so we can narrow the options to ones that start with a 3

the rule the define for us says that the next term is 2 times the one before it:

t2 = 2*t1, so 2*3 equals?

Answer 6

6

Answer 7

then since only one option starts out 3,6 that is the one to choose