Question

-50, 15, -4.5, ...
What is the 5th term in the sequence?

Answer 1

a5= -81/200

because the formula

an=−50(−3)n−110n−1

a5=−50(−3)(5)−110(5)−1

a5=−50⋅81105−1

sorry kinda hard to write all exponent correctly

but this is the answer

Answer 2

-1.183...

You have to either subtract or add the number by its 1/10th
-50+5= -45
-45/-3=15

15-1.5=13.5
13.5/-3= -4.5

Following this sequence, the 5th term would be -1.183...