Answer:
3√3+i3
Step-by-step explanation:
w= 36(cos60°+ isin60°)
√w = 
=√36(cos60°+ isin60°)
=6√(cos60°+ isin60°)
now using DeMoivre's theorem
=(cos60°+ isin60°)^{1/2}
=(cos60°/2+ isin60°/2)=(cos30°+ isin30°)
w^{1/2}=6(cos30°+ isin30°)
=6(sqrt3/2+i1/2)
=3√3+i3
Lets x is price of noble fir trees and y - is price for douglas fir trees
students got 5x+3y=420$ on friday
and 12x+9y=1080
now we need just solve the system of equations
5x+3y=420 - multiply by 3
12x+9y=1080
15x+9y=1260
12x+9y=1080
substract second equation from first
15x-12x=1260-1080
3x=180
x=60$ - the price of noble fir trees
put value x=60 in first equation 5x+3y=420
5*60+3y=420
300+3y=420
3y=120
y=40$ - price of Douglas fir trees
Answer: Noble fir trees cost $60 and Douglas fir trees cost $40
The answer to this is.9/10
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1. you would take 36×1/4 and then it would equal 9
2. you would take 24×1/4 and then it would equal 6
Answer:
k=0
Step-by-step explanation:
R(x)=kx-2x²
R(1/4)=k(1/4)-2(1/4)²=k/4-1/8
R(-1/4)=k(-1/4)-2(-1/4)²=-k/4-1/8
R(1/4)=R(-1/4)
k/4-1/8=-k/4-1/8
k/4+k/4=1/8-1/8
2k/4=0
2k=0
k=0
