3 years ago

What is the 20th term for the following sequence? 3,-9, 27,-81, ...

Mathematics

1 answer:

anygoal [31]3 years ago

8 0

Answer: -3486784401

Step-by-step explanation:

This is a geometric progression and the formula to use to find the nth term will be: = ar^(n-1)

where,

a = 3

r = -9/3 = -3

n = 20

Therefore, ar^(n-1)

= 3 × -3^19

= 3 × -1162261467

= -3486784401

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