Ответ:
Объяснение:
log1/3x-log1/3y=-1
x=y^2-4
log1/3(y^2-4)-log1/3y=-1
x=y^2-4
log1/3(y^2-4)-log1/3y=-1
log1/3((y^2-4)/y)=log1/3(3)
(y^2-4)/y=3
y^2-4=3y
y^2-3y-4=0
D=9+16=25
= 4
= -1
= 16-4=12
= 1-4=-3
Y=2sin(x+π/3)+1=2sin(2π/3+π/3)+1=2sin(3π/3)+1=
=2sinπ+1=2.0+1=0+1=1
√ X + √ Y = 5
3 √ X - √ Y = 12
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√ X = A ; A > 0
√ Y = B ; B > 0
-----------------
A + B = 5
3A - B = 12
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4A = 17
A = 4,25
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4,25 + B = 5
B = 0,75
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√ X = A
√ X = 4,25
X = 18,0625
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√ Y = B
√ Y = 0,75
Y = 0,5625
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Ответ ( 18,0625 ; 0,5625 )
(8x - 3y)^2 + 16x (-2x + 3y) - 32x^2 = 64x^2 - 48xy + 9y^2 - 32x^2 + 48xy - 32x^2 = 9y^2 = 9*(sqrt (7))^2 = 9* 7 = 63.