Comments by "Fhf Fhf" (@fhffhff) on "VoicePower" channel.

  1. √(a²/4-(a-x)²)+a/2=√(a²-x²),x[a/2;a] 0=5x²-8xa+3a²,x≤0,75a x=a;0,6a✓ S1=(0,5arccos0,6-0,4)a² S2=(π/8- 1/8arccos0,6-0,1)a² S=S1+S2=(0,375arccos0,6-0,5+π/8)a²
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  2. y''>0 вогнута функция
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  3. (1/25^x)²/5+a(1/25)^x-a-2=0 (1/25)^x=-2,5 a±5√(a²+4/5a+8/5)/2≥0 x=log0,04(-2,5a±5 √(a²+4/5a+8/5)/2)[aR,a≤-2.
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  4. 2xsinx+x²cosx✓
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  5. 6^36/6³⁵=6
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  6. $-sin(cosx)dcosx=coscosx+c
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  7. $(0;1)dye^y=e^y(0!1)=e-1
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  8. {a=2,5±√1,75i,b=-2,5±√1,75i.{-8}
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  9. $0,5sinx²dx²=-0,5cosx²+c
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  10. {х+у=1,ху=-12;х⁵+у⁵=(х+у)((х+у)⁴-5 ху((х+у)²-ху))=781
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  11. $(0;π)dx*xsin1=π²/2sin1
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  12. $(0;1)y²dy/4=y³/12(0;1)=1/12
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