a, \(\sqrt{15}+\sqrt{8}< \sqrt{16}+\sqrt{9}=4+3=7\)
\(\Rightarrow\sqrt{15}+\sqrt{8}< 7\)
b, \(\sqrt{10}+\sqrt{17}+1>\sqrt{9}+\sqrt{16}+1=3+4+1=8\)
\(\sqrt{61}< \sqrt{64}=8\)
\(\Rightarrow\sqrt{10}+\sqrt{17}+1>\sqrt{61}\)
c, \(\sqrt{10}+\sqrt{5}+1>\sqrt{9}+\sqrt{4}+1=3+2+1=6\)
\(\sqrt{35}< \sqrt{36}=6\)
\(\Rightarrow\sqrt{10}+\sqrt{5}+1>\sqrt{35}\)