хₙ=(n-4)(n+1)
x₁=(1-4)(1+1)=-3*2=-6
x₂=(2-4)(2+1)=-2*3=-6
x₃=(3-4)(3+1)=-1*4=-4
x₄=(4-4)(4+1)=0
x₅=(5-4)(5+1)=1*6=6.
хₙ=(n-4)(n+1)
x₁=(1-4)(1+1)=-3*2=-6
x₂=(2-4)(2+1)=-2*3=-6
x₃=(3-4)(3+1)=-1*4=-4
x₄=(4-4)(4+1)=0
x₅=(5-4)(5+1)=1*6=6.