Question

What is the 8th term of this geometric sequence? 6, 48, 384, 3072, . . .

Answer 1

12582912

Explanation:

You simply need to start by finding the pattern. Divide the second number by the first (the answer is 8), then divide the third number by the second, so on and so on. You will see the answer is always 8 which means each number is getting multiplied by eight to reach the next term. Finally, multiply the last number in the sequence by your answer (8) until you reach the 8th term.

Answer 2

a(8)=12582912

Explanation:

The 8th term can be determined by the formula:

an = a1 * r^(n-1)

where

n = the term to be found = 8

a1 = 1st number

r = common ratio

Common ratio can be found by dividing the second term by the first term

= 48/6 = 8

Substitute the values in the formula

a(8) = 6 * 8^(8-1)

a(8) = 6 * 8^7

a(8)= 6*8*8*8*8*8*8*8

a(8) = 6 * 2097152

a(8)=12582912 ....

Therefore the 8th term is 12582912 ....