22 · (17/26х - 3/4) = 5 1/13
17/26х - 3/4 = 5 1/13 : 22/1
17/26х - 3/4 = 66/13 · 1/22
17/26х - 3/4 = 3/13
17/26х = 3/13 + 3/4
17/26х = 12/52 + 39/52
17/26х = 51/52
х = 51/52 : 17/26
х = 51/52 · 26/17
х = 3/2
х = 1 1/2 или 1,5
6*8с /(6*7с)=6/7
.............
2.
а=3
b=3*2=6
c=3*3=9
V=a*b*c=3*6*9=162 (A)
3.
2(a^2-2ab+b^2)=2(a-b)^2
a^2-b^2=(a-b)(a+b)
тогда упростится и получится 2(a-b)/(a+b)=2*1/5=2/5 (Б)
4.
15 - 8; 16 - 12; 17 - 20; 18 - 16; 19 - 14
(8+12+20+16+14)/5=70/5=14 (Б)
У=f'(Xo)*(X-Xo) +f(Xo)
F(Xo) =F(-3)=2*(-27)+9-1=-54+8=-46
F'(x)=6x^2-3
F'(Xo)=6*9-3=54-3=51
Y=51*(x+3)-46=51x+153-46=51x+107