Answer:
819
Step-by-step explanation:
Givens
Formula
Sum = a(1 - r^n) / ( 1 - r)
Sum = -1(1 - (-4)^6 / (1 - -4)
Sum = -1 (1 - 4096) / 5
Sum = -1 (- 4095 ) / 5
Sum = 819
This in what I got:
(-7i)(10i)
-70i
The next term in each sequence can be found by adding 2/4
the next to terms in the sequence are 4 1/4 and 4 3/4