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

  1. (2а)²+(0,5√(25-а²))²=25 а=√5 S=3*√5*√20=30
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  2. [√n+√(n+1)+√(n+2)]=[√(9n+8)] {√n+√(n+1)+√(n+2)+1≥√(9n+8),√n+√(n+1)+√(n+2)-1≤√(9n+8); √n(√(n+1)+√(n+2)+1)≤-√((n+1)(n+ 2))-√(n+1)-√(n+2)+3n+2× n=-0,778;-0,258;-0,888× n[m²/9-8/9;(m+1)²/9-8/9),√n+√(n+1)+√(n+2)[(√(m²-8)+√(m²+1)+√(m²+10))/3; (√((m+1)²-8)+√((m+1)²+1)+√((m+1)²+10))/3),m=3,75.. m=1,6*10²⁷;1,9*10²⁹;3,2*10²⁷ m=3,√n+√(n+1)+√(n+2)[2,8..;4,03..) n[0,16..;0,88..)U[(m²-8)/9~;(m+1)²/9 -8/9~)m≥4 √n+√(n+1)+√(n+2)[4,03..; 5 17/360)
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  3. 0,25(56/45)=14/45
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  4. 525/16✓
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  5. {ax²=lnx,2ax=1/x;{e^(1/2)=x,a=1/e/2.
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  6. [х=-1,х=2.
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  7. a²+(a-√2)²=(3√2)² a=√2/2+√8,5 AB=(a-√2)/a*2√2+..=3√2 ..=(3√2+√34)/4
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  8. 8^(5/3)*2=a a=2⁵*2=64
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  9. |x|x/2-|x-1|(x-1)/2(-1:2)=2²/2-1²/2+1²/2+2*-2/2=0
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  10. Х+7/х=у 0=у²-25у+144 у=(25±7)/2=16;9 [х²-16х+7=0,х²-9х+7=0;[х=8±√57,х=4,5±√53/2.
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  11. b²(2-√3)=2 b=√2(√1,5-√0,5)=√3-1✓ a=3√3-5✓
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  12. X[10;90] 26=x✓
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  13. S=25/2(π/2-1)+12=25π/4-0,5 S=75π/4+0,5 1/4(75π+2) 77✓
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  14. X=yt(y) -1/y=t'sint ±yarccos(ln|y|-c) =x +✓,c=0 x=yarccos(ln|y|) cosx(2)=2ln²2-1 (2)✓
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  15. $(sh-1;sh1)2ysiny*dy=-2ycosy+2sin y(-(e-e-¹)/2;(e-e-¹)/2)=-2(e-e-¹)cos((e- e-¹)/2)+4sin((e-e-¹)/2)
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