-2+7х=8х+1
7х-8х=1+2
-х=3
х=-3
1) (x^2 - 4)(x^2 - 6) = 0 раскрыть скобки х^4 -10х^2 +24 = 0
(x^2 ^- 5)(x^2 - 16) = 0 аналогично х^4 - 21х^2 + 80 = 0
<span>task/28177870
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Найти производную функции
1 . y=(x+9)</span>⁴<span>/ (x-3) 2. y=x*sin(3x-π/2)
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</span>1.
* * * ( u / v) ' =( u ' *v - u *v ' ) / v² * * *
y ' = ((x+9)⁴/ (x-3) ) ' = (4(x+9)³ (x-3) - (x+9)⁴ *1) / (x-3)² .
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2.
* * * (uv) ' = u ' *v + u*v ' ; sin(3x-π/2)= - sin(π/2 - 3x) = - cos3x * * *
y ' ( x*sin(3x-π/2)' = (- x* cos3x ) ' = - ( x* cos3x ) ' =
- ( 1*cos3x +x*(-sin3x)*(3x) ' ) = 3sin3x - cos3x .
ОДЗ x≠7 U x≠-9
log(4)(7-x)²+log(4)(x+9)²-log(4)(x+9)²=4
log(4)(7-x)²=4
(7-x)²=4^4
|7-x|=16
7-x=-16 U 7-x=16
x=7+16 U x=7-16
x=23 U x=-9∉ОДЗ
