Bună!
1) [tex]\frac{2^{5} }{7^{n} }[/tex] este supraunitară ⇒ 2⁵>7ⁿ
2⁵=32
7⁰=1; 7¹=7; 7²=49 (1 și 7<32 , 49>32)
B) 0 sau 1
2) [tex]\frac{8}{19}[/tex] ≈ 0,421
[tex]\frac{4}{11}[/tex] ≈ 0,363
[tex]\frac{2}{5}[/tex] ≈ 0,4
0,363<0,4<0,421
D) [tex]\frac{4}{11} ; \frac{2}{5}; \frac{8}{19}[/tex]
3) [tex]2\frac{4}{9} -(\frac{5}{8}:\frac{3}{4} )^{2} <=>[/tex]
[tex]<=> \frac{22}{9} - (\frac{5}{8} *\frac{4}{3} )^{2} <=>[/tex]
[tex]<=> \frac{22}{9} -(\frac{5}{6} )^{2} <=>[/tex]
[tex]<=>^{4)} \frac{22}{9} -\frac{25}{36} = \frac{7}{4}[/tex]
[tex]1\frac{3}{4} =\frac{1*3+4}{4} =\frac{7}{4}[/tex]
C) [tex]1\frac{3}{4}[/tex]
