Question

Write the formula for the geometric sequence.
5, 10, 20, 40, …

Answer 1

\(A_n = A_1r^{n-1}\)

Answer 2

Try to find the common ratio first by b/a or c/b or d/c

Answer 3

where A1 is first term,
r = common ratio

Answer 4

could u find common ratio ?

Answer 5

so is the formula A1=5*2^n?

Answer 6

its n-1 in formula

Answer 7

ohhhh ok so A1=5*2^n-1

Answer 8

yes, An = 5* 2^(n-1)

Answer 9

or An= 5/2 * 2^n

Answer 10

ok c:

Answer 11

thats your formula