Question

[minamoto shizuka]

So sánh:

a)\(\sqrt{5}+1\) và 3                    b)\(2-\sqrt{15}\)và -3                 c)\(3-\sqrt{2}\)và \(2-\sqrt{15}\)

Answer 1

[Ly Nguyễn]

a.3=2+1=\(\sqrt{4}\)+1<\(\sqrt{5}\)+1

b.-3=2-5=2-\(\sqrt{25}\)<2-\(\sqrt{15}\)

c.2-\(\sqrt{2}\)>2-\(\sqrt{15}\)=>1+2-\(\sqrt{2}\)>2-\(\sqrt{15}\)