Question

[๖ۣۜSao Băng彡★]

So sánh:

a) \(\sqrt{11}+\sqrt{19}\)  và \(\sqrt{47}\)

b) \(\sqrt{7}+\sqrt{26}+1\) và \(\sqrt{63}\)

Answer 1

[Dương No Pro]

\(a\)

\(\sqrt{11}+\sqrt{19}\)

\(=\)\(\sqrt{11+19}\)

\(=\)\(\sqrt{30}\)

\(=\)\(5,47\)

\(\sqrt{47}\)

\(=6,85\)

\(5,47\)\(< \)\(6,85\)

\(=>\)\(\sqrt{11}+\sqrt{19}\)\(< \)\(\sqrt{47}\)

\(b\)

\(\sqrt{7}+\sqrt{26}+1\)

\(=\)\(\sqrt{7+26}+1\)

\(=\)\(\sqrt{33}+1\)

\(=\)\(5,74+1\)

\(=\)\(6,74\)

\(\sqrt{63}\)

\(=\)\(7,93\)

\(6,74\)\(< \)\(7,93\)

\(=>\)\(\sqrt{7}+\sqrt{26}+1\)\(< \)\(\sqrt{63}\)

Học tốt!!!