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Repedeeeee!!!!!!! URGENTTTT!!!

Repedeeeee URGENTTTT class=

Răspuns :

b)14<2ⁿ<129 =>n∈{4,5,6,7}, 2⁷=128

c)3ⁿ⁺¹<57<3ⁿ⁺² =>n∈{2}, 3³=27 si 3⁴=81 <=>27<57<81

d)7ⁿ⁻²≤7³ =>n-2≤3 =>n≤5 =>n∈{0,1,2,3,4,5}