Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Ta có:
\(3^{39}< 3^{42}\)
Mà: \(3^{42}=\left(3^2\right)^{21}=9^{21}\)
Lại có: \(9< 11\Rightarrow9^{21}< 11^{21}\)
\(\Rightarrow3^{39}< 11^{21}\)
\(201^{60}=\left(201^4\right)^{15}=1944810000^{15}\)
\(398^{45}=\left(398^3\right)^{15}=63044792^{15}\)
Do \(1944810000>63044792\)
\(\Rightarrow1944810000^{15}>63044792^{15}\)
\(\Rightarrow201^{60}>398^{45}\)
Ta có:
\(201^{60}>200^{60};398^{45}< 400^{45}\)
\(200^{60}=\left(2.100\right)^{60}=2^{60}.100^{60}=2^{60}.\left(10^2\right)^{60}\)
\(=2^{60}.10^{120}=2^{60}.10^{30}.10^{90}\)
\(400^{45}=\left(2.100\right)^{45}=2^{45}.100^{45}=2^{45}.\left(10^2\right)^{45}\)
\(=2^{45}.10^{90}\)
Mà \(2^{60}.10^{30}.10^{90}>2^{45}.10^{90}\)
\(\Rightarrow200^{60}>400^{45}\)
\(\Rightarrow201^{60}>200^{60}>400^{45}>398^{45}\)
\(\Rightarrow201^{60}>398^{45}\)
a. \(5^{127}=5.5^{126}=5.125^{72}>119^{72}\)
\(\Rightarrow5^{217}>119^{72}\)
b. \(2^{1000}=\left(2^5\right)^{200}=32^{200}\)
\(5^{400}=\left(5^2\right)^{200}=25^{200}\)
\(\Rightarrow2^{1000}>5^{400}\)
c. \(9^{12}=\left(3^2\right)^{12}=3^{24}\)
\(27^7=\left(3^3\right)^7=3^{21}\)
\(\Rightarrow9^{12}>27^7\)
d. \(125^{80}=\left(5^3\right)^{80}=5^{240}\)
\(25^{118}=\left(5^2\right)^{118}=5^{236}\)
\(\Rightarrow125^{80}>25^{118}\)
e. \(5^{40}=\left(5^4\right)^{10}=625^{10}\)
\(\Rightarrow5^{40}>620^{10}\)
f. \(27^{11}=\left(3^3\right)^{11}=3^{33}\)
\(81^8=\left(3^4\right)^8=3^{32}\)
\(\Rightarrow27^{11}>81^8\)
Ta có:
\(\frac{22}{49}>\frac{3}{7}\)
Mà \(\frac{3}{7}>\frac{3}{8}\)
=>\(\frac{22}{49}>\frac{3}{8}\)
Cái này có Phân số trung gian là:\(\frac{21}{49}=\frac{3}{7}\)
\(\frac{37}{195}\)và\(\frac{73}{179}\)
Ta có
\(\frac{37}{195}< \frac{37}{179}< \frac{73}{179}\)
\(\Rightarrow\)\(\frac{37}{195}< \frac{73}{179}\)
Vậy \(\frac{37}{195}< \frac{73}{179}\)
em sử dụng phân số trung gian là 1/4 nhé; 16/63>16/64=1/4 = 5/20>5/22
Ta có:
\(5^{217}>5^{216}\)
Mà: \(5^{216}=5^{3\cdot72}=\left(5^3\right)^{72}=125^{72}\)
Lại có: \(125>119\Rightarrow125^{72}>119^{72}\)
\(\Rightarrow5^{216}>119^{72}\)
\(\Rightarrow5^{217}>119^{72}\)