👤

ex 17!!!!urgent!!!!!!!!!!

Ex 17urgent class=

Răspuns :

b)14<2ⁿ<129
n∈{4,5,6,7}

c)3ⁿ⁺¹<57<3ⁿ⁺²
n∈{1,2}

d)7ⁿ⁻²≤343
343=7³
n-2≤3 =>n≤5
n∈{2,3,4,5}