(x+5)+x=210/2
(x+5)+x=105
x+5=105-x
x+x=105-5
2x=100
x=100/2
x=50
4.36:(3.15+2.3)+(0.792-0.78)*350=
=4.36:5.45+0.012*350=
=0.8+4.2=
=5
Ответ: 5
А)y' = 2x +4
б) y' = -6/x² +1/√ч
в) y'= ((x⁶ -4x +1)'*x - (x⁶ -4x+1)*x')/x² =((6x⁵-4)*x -x⁶+4x-1)/x²=
=(6x⁶-4x-x⁶+4x-1)/x² = (5x⁶-1)/x²
г) y'=1
д) y'=((3x-4)'*(7-2x) - (3x -4)*(7-2x)')/(7-2x)²=
=(3(7-2x)+2(3x-4))/(7-2x)²= (21-6x +6x -8)/(7-2x)²=13/(7-2x)²
e) y'=6Cos2x
ж) y'=1/2√(x²-4x) * (x²-4x)' = (2x-4)/2√(x²-4x)=(x-2)/√(x²-4x)
1 3 5 15
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