1) (3x*2-6x)'cosx+(3x*2-6x)cos'X=(6x-6)cosx-sinx(3x*2-6x)
2)(6x*2-8)'(3x*2+4)-(6x*2-8)(3x*2+4)'/(3x*2+4)*2=12x(3x*2+4)-6x(6x*2-8)/3x*2+4)*2=36x*3+48x-36x*3+48x/3x*2+4)*2=96x/(3x*2+4)*2
Х(х^2-9)=0
x=0 x^2-9=0
x^2=9
x=3
~•~•~•ZLOY_TIGROVSKIY~•~•~•
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