Answer:
-2324522934
Step-by-step explanation:
These are the terms of a geometric sequence with n th term
[tex]a_{n}[/tex] = a[tex](r)^{n-1}[/tex]
where a is the first term and r the common ratio
r = [tex]\frac{-6}{-2}[/tex] = 3 and a = - 2, hence
[tex]a_{20}[/tex] = - 2 × [tex]3^{19}[/tex] = - 2324522934
