11х+8х-5+3х+1=-26
22х=-26+4
22х=-22
х=-1
А
m+2√m+n²+m-2√m+n²=2m+2n²
б
(m^1/4-2n^1/3-m^1/4-2n^1/3)(m^1/4-2n^1/3+m^1/4+2n^1/3)=
=-4n^1/3*2m^1/4=-8m^1/4n^1/3
в
m-√n
г
m^3/2-n³
-0.8*4-1.4*2*3-6.7=-3.2-8.4-6.7=-18.1
Tg(x/2 + π/4) < √3/3
- π+ πn < x/2 + π/4 < arctg(√3/3) + πn, n∈Z
- π+ πn < x/2 + π/4 < π/6 + πn, n∈Z
- π - π/4 + πn < x/2 < π/6 - π/4 + πn, n∈Z
- 5π/4 + πn < x/2 < -π/12 + πn, n∈Z
- 5π/2 + 2πn < x < -π/6 + 2πn, n∈Z