Task/25586750
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v ≡ ИЛИ
1.
1991/1992 - 1990/1991= (1990+1) /(1991+1) - 1990/1991 =
(1990*1991+1991 -1990*1991 -1990) / (1991+1) 1991 =1/1991*1992 >0
т.е. 1990/1991 < 1991/1992 ⇒<strong> ∛(1990/1991) < ∛(1991/1992</strong>)
∛(1990/1991) < </strong>∛(1991/1992 )
2.
∛47 v √13 ; (∛47)^6 v (√13 )^6 ; 47² v 13³ * * * 2209 > 2197 * * *
∛47 > √13
3.
√(ctg(π/4) - 2sin(3π/2) ) v ∛5 ; √(1 - 2*(-1)) v ∛5 ; √3 v ∛5 ;
(√3)⁶ v (∛5)⁶ ; 3³ > 5²
√(ctg(π/4) - 2sin(3π/2) ) > ∛5