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a, 2^300 < 3^200
b, 3^500 < 7^300
c, 8^5 > 3.4^7
d, 202^303 < 303^202
![](https://rs.olm.vn/images/avt/0.png?1311)
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: \(8242408>91809\)
\(\Rightarrow8242408^{101}>91809^{101}\)
\(\Rightarrow202^{303}>303^{202}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
5200=(52)100=25100.
2500=(25)100=32100.
Vì 25 < 32 => 25100<32100=>5200<2500
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
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 \(4^{21}=4^{21}\Rightarrow4^{21}=64^7\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5^{200}=25^{100}\)
\(3^{300}=27^{100}\)
mà 25<27
nên \(5^{200}< 3^{300}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(I-2I^{300}vàI-4I^{500}\)
ta có I -2I ^300 = 2^300
I-4I^500= 4^500= 2^2^500= 2^1000
vậy I-4I mũ 500 lớn hơn
![](https://rs.olm.vn/images/avt/0.png?1311)
a,320 và 274
320=(35)4=2434>274
Vậy 320>274
b,534 và 25x530
25x530=52x530=532<534
=>534>25x530.
c,224và 266
224=(24)6=166<266
=>224<266
d,1030và 450
1030=(103)10=100010
450=(45)10=102410
Vì 100010<102410nên 1030<450.
e,2300và 3200
2300=(23)100=8100
3200=(32)100=9100
Vì 8100<9100 nên 2300<3200
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5^{200}=5^{2\times100}=\left(5^2\right)^{100}=25^{100}\)
\(2^{500}=2^{5\times100}=\left(2^5\right)^{100}=32^{100}\)
vì 32>25 nên 32100>25100 hay 2500 > 5200
\(3^{200}=3^{2\times100}=\left(3^2\right)^{100}=9^{100}\)
\(2^{300}=2^{3\times100}=\left(2^3\right)^{100}=8^{100}\)
vì 9>8 nên 9100>8100 hay 3200>2300