1) g(x) = x^2 - 4x + 1
Xв = -b/2a = - -4/2*1 = 2
Yв = 2^2 - 4*2 + 1 = -3
(2; -3)
2) g(x) = x^2 + 6x
Хв = -b/2a = - 6/2*1 = -3
Yв = (-3)^2 + 6*(-3) = -9
(-3; -9)
3) g(x) = 10 - 2x + 5x^2
Xв = -b/2a = - -2/2*5 = 1/5
Yв = 10 - 2*1/5 + 5*(1/5)^2 = 8 4/5
(1/5; 8 4/5)
4) g(x) = 3 - x - x^2
Xв = -b/2a = - -1/2*(-1) = -1/2
Yв = 3 - (-1/2) - (-1/2)^2 = 3 + 1/2 - 1/4 = 3 1/4
(-1/2; 3 1/4)
cos (pi/12)=cos(pi/3-pi/4)=cos (pi/3)cos (pi/4)+sin(pi/3)sin(pi/4)=1/2*|/2/2+|/3/2*|/2/2=|/2/4+|/6/4=(|/2+|/6)/4
|/ Корень
/ дробь
Ответ:
Объяснение:
а) c6*c5=c6+5=c11;
б) (a4)3=a12;
в) 10ab+(a-5b)2=10ab+(a2-2*5ab+25b)=10ab-a2+10ab+25ab= -a2+25ab;
г) (b+3)2-(b+2)(b-2)-6b=(b2+2*3b+9)-(b2-4)-6b=b2+6b+9-b2-4-6b= -4
Ответ:
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