Answer:
136
Step-by-step explanation:
3x4x2 + 7x4x4 =136
16,767
Geometric sequence formula: an = ar^n-1
Now, we just plug in the values.
an = 23(3)^7-1
an = 23(3)^6
an = 23(729)
an = 16,767
b
The answer is (3+5i)-(2+i)
