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8 mũ 300=(8 mũ 3)mũ 100=512 mũ 100
9 mũ 200=(9 mũ 2) mũ 100=81 mũ 100
vì 512 mũ 100< 81 mũ 100 =>8 mũ 300 > 9 mũ 200
chắc chắn 100 %
Ta có :
\(8^{300}=\left(8^3\right)^{100}=512^{100}\)
\(9^{200}=\left(9^2\right)^{100}=91^{100}\)
Vì \(512^{100}>91^{100}\Rightarrow8^{300}>9^{200}\)
\(10^{30}vs\)\(2^{100}\)
\(10^{30}=\left(10^3\right)^{10}=1000^{10}\)
\(2^{100}=\left(2^{10}\right)^{10}=1024^{10}\)
Vì \(1000^{10}< 1024^{10}=>10^{30}< 2^{100}\)
\(3^{54}vs2^{81}\)
\(3^{54}=\left(3^6\right)^9=729^9\)
\(2^{81}=\left(2^9\right)^9=512^9\)
Vì \(729^9>512^9=>3^{54}>2^{81}\)
\(3^{200}=\left(3^2\right)^{100}=9^{100}\)
\(2^{300}=\left(2^3\right)^{100}=8^{100}\)
Vì \(8^{100}< 9^{100}=>2^{300}< 3^{200}\)
a) Ta có:
\(2^{300}=2^{3\cdot100}=\left(2^3\right)^{100}=8^{100}\)
\(3^{200}=3^{2\cdot100}=\left(3^2\right)^{100}=9^{100}\)
Mà: \(8< 9\)
\(\Rightarrow8^{100}< 9^{100}\)
\(\Rightarrow2^{300}< 3^{200}\)
b) Ta có:
\(3^{500}=3^{5\cdot100}=\left(3^5\right)^{100}=243^{100}\)
\(7^{300}=7^{3\cdot100}=\left(7^3\right)^{100}=343^{100}\)
Mà: \(243< 343\)
\(\Rightarrow243^{100}< 343^{100}\)
\(\Rightarrow3^{500}< 7^{300}\)
c) Ta có:
\(8^5=\left(2^3\right)^5=2^{3\cdot5}=2^{15}=2\cdot2^{15}\)
\(3\cdot4^7=3\cdot\left(2^2\right)^7=3\cdot2^{2\cdot7}=3\cdot2^{14}\)
Mà: \(2< 3\)
\(\Rightarrow2\cdot2^{14}< 3\cdot2^{14}\)
\(\Rightarrow8^5< 3\cdot4^7\)
d) Ta có:
\(202^{303}=202^{3\cdot101}=\left(202^3\right)^{101}=8242408^{101}\)
\(303^{202}=303^{2\cdot101}=\left(303^2\right)^{101}=91809^{101}\)
Mà: \(8242408>91809\)
\(\Rightarrow8242408^{101}>91809^{101}\)
\(\Rightarrow202^{303}>303^{202}\)
a)\(8^{300}=\left(2^3\right)^{300}=2^{900}\)
Vì \(200< 900\Rightarrow2^{200}< 8^{300}\)
b)\(25^{200}=\left(5^2\right)^{200}=5^{400}\)
Vì \(400>300\Rightarrow25^{200}>5^{300}\)
c)\(64^7=\left(4^3\right)^7=4^{21}\)
Vì \(4^{21}=4^{21}\Rightarrow4^{21}=64^7\)
\(5^{200}=25^{100}\)
\(3^{300}=27^{100}\)
mà 25<27
nên \(5^{200}< 3^{300}\)
a)\(2^{300}=8^{100}\)
\(3^{200}=9^{100}\)
\(2^{300}< 3^{200}\)
b)\(125^5=\left(25.5\right)^5=\left(5.5.5\right)^5=5^{15}\)
\(25^7=\left(5.5\right)^7=5^{14}\)
\(125^5>25^7\)
c)\(9^{20}=\left(3.3\right)^{20}=3^{40}\)
\(27^{13}=\left(3.3.3\right)^{13}=3^{39}\)
\(9^{20}>27^{13}\)