Ответы:
1) Сумма цих чисел = 57,56
54,36 + 3,2 = 57,56
2) 19,07 > 8,3 на 10,77
19,07 - 8,3 = 10,77
6+(14-5)= 15
18-(2+6)=10 )))))))))))))))))))))))))
3/11=0,27272727...=0,(27)=0,27
1+5/9=1,55555....=1,(5)=1,56
S=t^3/3+2/πsin((π<span>t)/8).
V = S' = t</span>² + 2/π*Cosπt/8 * π/8 = t² + π²/4*Cos ((πt)/8)
V(4) =4² +π²/4 *Cos(π/2) = 16
а = V' = 2t -π²/4*Sin ((πt)/8)* π/8 = 2t - π³/32*Sin((πt)/8)
a(4) = 2*4 -π³/32*Sinπ/2 = 8 - π³/32 (Sinπ/2 = 1)