The 20th term of the sequence -2, 4, -8, 16... is 1,048,576.
What is a geometric progression?
A geometric progression is a sequence in which the ratio between every two consecutive terms is equal. This is known as the common ratio.
a_n = ar^(n-1)
The 20th term can be found as shown below:
The given sequence is a geometric progression.
From the sequence we can identify that:
a = -2
r = -2
We have to find a_20:
a_20 = ar^(20-1)
= -2* (- 2^19)
= (- 2)^20
= 1,048,576
Therefore, the 20th term of the sequence -2, 4, -8, 16... is 1,048,576. The correct answer is option D.
Learn more about geometric progression here: https://brainly.com/question/1509142
#SPJ2
