Log₁/₃(√3/(7+2*√10))+log√₃(1/(√5+√2))=
=log₃⁻¹(√3/(7+2*√10))+log₃¹/²(1/(√5+√2))=
=log₃(√3/(7+2*√10))⁻¹+log₃(1/(√5+√2)²)=
=log₃((7+2*√10)*1)/(√3*(√5+√2)²)=
=log₃(7+2√10)/(√3*((√5)²+2*√5*√2+(√2)²))=
=log₃(7+2√10)/(√3*(7+2*√10))=
=log₃(1/√3)=log₃3⁻¹/²=-1/2.
(1 1/9 + 2 5/6)х = 1/9
(1 2/18 + 2 15/18)х = 1/9
3 17/18х = 1/9
х = 1/9 : 3 17/18
х = 1/9 : 71/18
х = 1/9 × 18/71
х = 1/1 × 2/71
х = 2/71
Ответ: 2/71
Площадь (S)=a*b
Периметр (P)=(a+b)*2