Comments by "Fhf Fhf" (@fhffhff) on "Продолжение следует" channel.

  1. 9,47/28*9,19/28*9,17/28*9,-99/28 35/9,28/9,56/9 S=-99/4(cm²)
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  2. 2:3*b√(0,5sin²_b:sin²(_a+_b)+0,5-0,2 5sin²_a:sin²(_a+_b)),2:3b√(0,5+0,5sin²_a:sin²(_a+_b)-0,25sin²_b:sin²(_a+_b)) h=S∆*2/b=b√((1/3√(0,5sin²_b:sin²(_a+_b)+0,5-0,25sin²_a:sin²(_a+_b))+1/3√(0,5+0,5sin²_a:sin²(_a+_ b)-0,25sin²_b:sin²(_a+_b))+1/2)(-1/3√(0,5sin²_b: sin²(_a+_b)+0,5-0,25sin²_a:sin²(_a+ b))+1/3√(0,5+0,5sin²_a:sin²(_a+ b)-0,25sin²_b:sin²(_a+_b))+1/2)(1/3√(0,5sin²_b: sin²(_a+_b)+0,5-0,25sin²_a:sin²(_a+ b))-1/3√(0,5+0,5sin²_a:sin²(_a+ b)-0,25sin²_b:sin²(_a+_b))+1/2)(1/3√(0,5sin²_b: sin²(_a+_b)+0,5-0,25sin²_a:sin²(_a+ b))+1/3√(0,5+0,5sin²_a:sin²(_a+ b)-0,25sin²_b:sin²(_a+_b))-1/2))*2
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  3. X≥0 0<1,≠>0 E! ±x-(√3-√2)^x=0 ±1-(√3-√2)^xln(√3-√2)=0 +×,x=log(√3-√2)(log(√3+√2)e),-✓ +>x+*->x max=log(√3+√2)(log(√3+√ 2)e/e)<0 x=0,53✓
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  4. $(0;1)xarcsinxdx=x²/2arcsinx+0,25 (-arcsinx+x√(1-x²))(0;1)=π/4+0,25(- π/2)=π/8
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  5. X≥1 x(x+1)=56 x=-0,5±7,5 x=7;-8{7}
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  6. S=11*14*0,5-7*4=49
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  7. X≥0 x⁴-9x²+3²*2=0 x²=(9±3)/2=6;3 x=√6;√3
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  8. {[x=πn,x=-arctg2,5+πn;[x≠-π/4+πm, x≠0,5π+πm;{πn;-arctg2,5+πn}
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  9. S∆=27/2+20-49/2=9
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  10. 9..9 m=2+17m1× 15=9+6 9799,9800
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  11. 4:00 Вестник бкри разоблачил миф о ''самоварах''.
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  12. y=-1-2/(x-²*c-1)
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  13. x,y>0 x=-y²/(y-1)
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  14. -(sin80°-sin40°)/sin20°=-2cos60°sin20°/sin20°=-2*0,5=-1
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  15. 1/120-1/12cos2x+5cos²2x/24=0 cos2x=(1±√3/2)/5 x=±1/2arccos(1/5±√3/10)+πn
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  16. x²-|3x-2|≥0 [x≥2/3,(x-1)(x-2)≥0+*+>x;{x<2/3,(x+1,5-√4,25)(x+1,5+√4,25)≥0+* +>x;[{x≥2/3,x(-∞;1]U[2;∞);{x<2/3,x(-∞;-1, 5-√4,25]U[-1,5+√4,25;∞);[x[2/3;1]U[2;∞),x (-∞;-1,5-√4,25]U[-1,5+√4,25;2/3);x(-∞;-1,5-√4,25]U[-1,5+√4,25;1]U[2;∞)
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  17. 0+3+..+3n-3=(3n-3)/2*n
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  18. (1 logx(y) logx(z))²=(3 4logx(y) 5logx(z)) (logy(x) 2 logy(z)). (4logy(x) 6 6logy(z)) (logz(x) logz(y) 3). (5logz(x) 6logz(y) 11) adjA²=(30 -14logx(y) -6logx(z)) (-14logy(x) 8 2logy(z)) (-6logz(x) 2logz(y) 2) adjagjA²=(12 16logx(y) 20logx(z)) (16logy(x) 24 24logy(z)) (20logz(x) 24logz(y) 44) |adjagjA²|=12*24*44+16*24*20+20*16*2 4-20*24*20-16²*44-12*24*24=24*480-11264=256
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  19. {x-y=2,x+y=1,5;(1,75;-0,25)
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  20. Ну не знаю, может быть.
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  21. (2x+y/(1+x²y²))/dy=(-x/(1+x²y²)+2y)/dx (1-x²y²)/(1+x²y²)²=(-1+x²y ²)/(1+x²y²)² ±x-¹=y✓
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  22. xe^(2x)x'(t)=te^-t xe^(2x)/2-e^(2x)/4 +c=-te^-t-e^-t e^(2x)(x/2-1/4)+(t+1)e^-t+c=0
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  23. (y+y-¹)y'(o)=sino*o y²/2+ln|y|=-ocos o+sino+c y²/2+ln|y|+ocoso-sino-c= 0
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  24. y'(t)/cos²y=2t tgy=t²+c y=arctg(t²+c)+πn π/4=atctgc+πn {c=1,n=0;y=arctg(t²+1)
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  25. y'e^2y=8x³ e^2y/2=2x⁴+c y=0,5ln(4x⁴+2c) 0=0,5ln(4+2c) c=e/2-2 y=0,5ln(4x⁴+e-4)
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  26. M(x,y)/dy=(-cos-²y+xy-¹)/dx M(x,y)'(y)=y-¹ M(x,y)=ln|y|+c c не зависит от у (-tgy+xln|y|)'-2x-¹(-tgy +xlny)-2x-¹tgy=c
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  27. (x-1/2)/(x-3)lnx<0°0-°1/2+°1-°3+>x x(0;1/2)U(1;3)
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  28. 3*16^(x²-16x-15 3/4)=48+24+.. 2^(4x²-64x-63)=2⁵ 4x²-64x-63=5 4x²-64x- 68=0 x=8±9=17;-1
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  29. 3^(1/2/x)≥9 0,5/x≥2 (x-0,25)/x≤0 x(0;0,25]
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  30. tg2x+sin2x=16/15ctgx,x≠π/4+πn/2,x≠πm cosx(-cos²2x-16/15cos2x+1)/cos2x/sinx =0[x=π/2+πn,cos2x=3/5,cos2x=-5/3;[x=π/2+πn,x=±1/2arccos(3/5)+πn;{π/2+πn;±1/2arccos(3/5)+πn}
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  31. [x²+0,5x-3=0,x²+0,5x+4=0;x≠-1/2 x=(-0,5±3,5)/2=1,5;-2✓
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  32. X-1/x=u x=(u+√(u²+4))/2 $(-∞;∞) e^-u²*(u²+4)-⁰,⁵u/2du+0,5√π=√π/2
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  33. (k+5)(K²-6k+30)=0{-5}
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  34. En=1;≠(1/(a-πn)+1/(a+πn))(-1)^n, a(-π;π) сходится
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  35. N=4 P(x)=a0x⁴+..+a3x+a4 a0(a0x⁴+..+a3x+a4-1)⁴+..+a3(a0x⁴+..+a3x+a4- 1)+a4=x¹⁶+1{a0=1,a1=0,a2=0,a3=0,[a4=1,a4=0;P(x)=x⁴+1;x⁴ P(2)=17;16
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  36. a²+2b(2b-3c)/(3c+1)a+(3c-1)(2b+ 1)+2b(2b+1)/(3c+1)=0 a=-b(2b-3c)/(3c+1)±√((2b²-3cb)²-(2b+1)(2b+9c² 1)(3c+1))/(3c+1) (3c+1)(2b+1)=( 2b²+3cb+3c+1±√((2b²-3cb)²-(2b+1)(2b+9c²-1)(3c+1)))(-1+(2b+1)(-1/(3 c+1)+2)) max=12
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  37. a=arccos(1-1/R) x=0,5arccos(1-1/R)R²-0,5√(2R-1)(R-1) x=(2R-1)²π/4-0, 5(π-arccos(1-1/R))R²-0,5√(2R-1)(R-1) 0=2R²-4R+1 R=1+√2/2 S=1*(2R-1)=1+√2
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  38. ​z=-16/17n+4ni/17
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  39. n:2,a=b=1,1+2c=2n1²×
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  40. BC=AB√3 DH=AB√3/(ctg15°+ctg 30°)=AB(3-√3)/4 HF=(AB/2-DH)√3 *2=AB(-√3+3)/2 HF=2DH SDEFH=AB²(3-√3)2/8=24-12√3
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  41. e^x^(1/(x-1))=y
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  42. tg36°/sino=√5/sin(126°-o) arctg(√(2-2√5/5)/(1+√5))=o{18°} 48+22√5≠-2√5/5 0,32..=18,24° √(2-0,4√5)/(1+√5)
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  43. А почему Вы полысели?
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  44. $(1;e)lnu*udu=u²/2lnu-u²/4(1;e)=e²/4+1/4
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  45. 4x/(x²-4)=8/(6-x) 0=3x²-6x-8 x=(3+√33)/3
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  46. xln|sinx|-$ln|sinx|dx(0;π/2)=-0*-∞- tgxln²|sinx|/2+..(0;π/2)=0
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  47. Y'√(1-y²)=±y'' x/2+c1=$dy/(arcsiny+ y√(1-y²)+2c)
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  48. √(208+16√(144-x²)) √(104+8√(144-x²)) 104+8√(144-x²)+8²-2√(104+8√(144-x²))*8cos(45°+ arccos((8+√(144-x²))/√(208+16√(1 44-x²)))=12² x=5
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  49. x=cos(π/4+πn/2)+isin(π/4+πn/2)
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  50. r/(√12-r)=2/4 r=2/3√3 V=4/3π(2/3√3)³=32π/27√3
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