Question

log 3-x с показателем (x^2-x-1) = 1

Answer 1

Log3-x(x^2-x-1)=1

ODS x∈(-∞, (1-√5)/2 )∪ (1+√5)/2,2)∪(2,3)

x^2-x-1=(3-x)^1

x^2-1=3

x^2=3+1

x^2=4

x=±2

x₁=2

x₂=-2