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a) \(2^x=16=2^4\Rightarrow x=4\)
b) \(x^3=27=3^3\Rightarrow x=3\)
c) \(x^{50}=x\Rightarrow x\left(x^{49}-1\right)=0\Rightarrow x=0\) hay \(x=1\)
d) \(\left(x-2\right)^2=16=4^2\Rightarrow x-2=4\) hay \(x-2=-4\)
\(\Rightarrow x=6\) hay \(x=-2\)
a) \(2^{300}=2^{3.100}=8^{100}\)
\(3^{200}=3^{2.100}=9^{100}\)
vì \(8^{100}< 9^{100}\)
\(\Rightarrow2^{300}< 3^{200}\)
b) \(3^{500}=3^{5.100}=243^{100}\)
\(7^{300}=7^{3.100}=343^{100}\)
vì \(243^{100}< 343^{100}\)
\(\Rightarrow3^{500}< 7^{300}\)
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a) 2x . 4 = 128
2x = 128 : 4
2x = 32
x = 32 : 2
x = 16
b)x . 17 = x
=> x = 0
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a/
\(27^{81}=\left(3^3\right)^{81}=3^{241}\)
\(81^{27}=\left(3^4\right)^{27}=3^{108}\)
\(\Rightarrow27^{81}=3^{241}>3^{108}=81^{27}\)
b/
\(5^{60}=\left(5^3\right)^{20}=125^{20}\)
\(7^{40}=\left(7^2\right)^{20}=49^{20}\)
\(\Rightarrow5^{60}=125^{20}>49^{20}=7^{40}\)
c/
\(11^{102}=\left(11^2\right)^{51}=121^{51}>121^{50}>99^{50}\)
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a) Ta có \(5^{300}=5^{3.100}=\left(5^3\right)^{100}=125^{100}\)
\(3^{500}=3^{5.100}=\left(3^5\right)^{100}=243^{100}\)
Vì 125 < 243 nên \(125^{100}< 243^{100}\)
Vậy \(5^{300}< 3^{500}\)
b) Ta có \(2^{15}=2^{13+2}=2^{13}.2^2=4.2^{13}\)
Vì 4<7 nên \(4.2^{13}< 7.2^{13}\)
Vậy \(2^{15}< 7.2^{13}\)
\(a)\)\(5^{300}=\left(5^3\right)^{100}=125^{100}\)
\(3^{500}=\left(3^5\right)^{100}=243^{100}\)
Vì \(125^{100}< 243^{100}\) nên \(5^{300}< 3^{500}\)
Vậy \(5^{300}< 3^{500}\)
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a)
Ta có : A = 275 = (33)5 = 315
B = 2433 = (35)3 = 315
Vì 315 = 315 => A = B
b )
Ta có : A = 2300 = (23)100 = 8100
B = 3200 = (32)100 = 9100
Vì 8100 < 9100 => A<B
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a, \(2^{300}=\left(2^3\right)^{100}=8^{100}< 9^{100}=\left(3^2\right)^{100}=3^{200}\)
b, \(5^{30}=\left(5^3\right)^{10}=125^{10}>124^{10}\)
c, \(64^7=\left(4^3\right)^7=4^{21}\)