гюйс

Verified answer

2/( -√(2n)+6)=(2(-√2n -6)) / ((-√2n +6)(-√2n -6))= - (2(√2n -6)) /(2-36)=(2(√2n -6)) / 34=(√2n -6) /17

√(1/144+1/6√x+x)=√(1/12+√x)²=1/12+√x

при  х=25/36
1/12+√(25/36)=1/12+5/6=1/12+10/12=11/12