Find the 5th term of the
sequence: 2, -6, 18, -54...

162 5th term

Step-by-step explanation:

5th term =162

Step-by-step explanation:

It is a geometric progression whose nth term = ar^n-1

Where a = 1st term =2

r=ratio of two term= -6/2=-3

n =nth term

So 5th term= 2x-3^5-1

=2x-3^4

=2x81=162 answer

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!