Think of imaginary numbers on a complex plane as coordinates - take the real part, that's the x coordinate, the imaginary part that's the y coordinate.
Therefore, for the first blank, -1+3i lies in the shaded area, because its coordinates are (-1,3).
And following on from that for the second one, -4i does not lie in the shaded area, since its coordinates are (0,-4).
Tl;dr is taking a complex number a+bi and placing it on a complex plane, it will have coordinates (a,b)
Answer:
20 boys
Step-by-step explanation:
30/3=10
10x2=20
Answer:
f(n) = 6* (3)^(n-1)
Step-by-step explanation:
We are multiplying by 3 each time
6*3 =18
18*3 = 54
So the common ratio is 3
The first term is 6
The formula for the geometric sequence is
an = a1 r^(n-1)
an = 6* (3)^(n-1)
f(n) = 6* (3)^(n-1)
4*10^4 is 40000 in standard notation
The answer is 0, as there is no slope going up or down.