Question

Care nr este mai mare
A) 2 radical2 sau radical din18
B) 5 radical din 243 sau 27 radical 27
Explicatie va rog
Dau coroana

Answer 1

[tex]\it a= 2\sqrt2= \sqrt{2^2\cdot2} =\sqrt{8} \\\;\\ b=\sqrt{18} \\\;\\ \sqrt{18} \ \textgreater \ \sqrt{8} \Rightarrow b \ \textgreater \ a[/tex]


[tex]\it \ a = 5\sqrt{243} =5\sqrt{81\cdot3} =5\cdot9\sqrt3 =45\sqrt3 \\\;\\ b=27\sqrt{27} =27\sqrt{9\cdot3} =27\cdot3\sqrt3 =81\sqrt3 \\\;\\ 81\sqrt3\ \textgreater \ 45\sqrt3 \Longrightarrow b\ \textgreater \ a[/tex]