\(a,2^{300}=\left(2^3\right)^{100}=8^{100}\)

\(3^{200}=\left(3^2\right)^{100}=9^{100}\)

Vì \(8^{100}< 9^{100}\) nên \(2^{300}< 3^{200}\)

\(b,8^5=32768\)

\(6^6=46656\)

Vì \(32768< 46656\) nên \(8^5< 6^6\)

\(c,3^{450}=\left(3^3\right)^{150}=27^{150}\)

\(5^{300}=\left(5^2\right)^{150}=25^{150}\)

Vì \(27^{150}>25^{150}\) nên \(3^{450}>5^{300}\)

#Ayumu

1: 243^5=(3^5)^5=3^25

3*27^8=3*3^24=3^25=243^5

3: 3^300=27^100

2^200=4^100

mà 27>4

nên 3^300>2^200

4: 15^2=3^2*5^2

81^3*125^3=3^12*5^9

=>15^2<81^3*125^3

6: 125^5=5^15

25^7=5^14

mà 15>14

nên 125^5>25^7

Bạn ghi rõ đc hk ạ

1: 243^5=(3^5)^5=3^25

3*27^8=3*(3^3)^8=3^25

=>243^5=3*27^8

6: 125^5=(5^3)^5=5^15

25^7=(5^2)^7=5^14

=>125^5>25^7(15>14)

5: 78^12-78^11=78^11(78-1)=78^11*77

78^11-78^10=78^10*77

mà 11>10

nên 78^12-78^11>78^11-78^10

a.

2²⁰⁰ < 3²⁰⁰

b.

125⁵ = (5³)⁵ = 5¹⁵ > 5¹⁴ = (5²)⁷ = 25⁷

 125⁵ > 25⁷

a) \(2^{200}\) và \(3^{200}\)

Ta có: \(2^{300}=2^{3.100}=\left(2^3\right)^{100}=8^{100}\)

\(3^{200}=3^{2.100}=\left(3^2\right)^{100}=9^{100}\)

Vì \(8< 9\) nên \(8^{100}< 9^{100}\)

Vậy \(2^{200}< 3^{200}\)

\(2^{200}\) và \(3^{200}\) đã cùng số mũ nên bạn không cần so sánh cũng được

b) \(125^5\) và \(25^7\)

Ta có : \(125^5=\) \(\left(5^3\right)^5\) \(=5^{15}\)

\(25^7=\left(5^2\right)^7\)\(=5^{14}\)

Vì \(15>14\) nên \(5^{15}>5^{14}\)

Vậy \(125^5>25^7\)

a) \(\dfrac{-1}{20}=\dfrac{-7}{140}\)

\(\dfrac{5}{7}=\dfrac{100}{140}\)

mà -7<100

nên \(-\dfrac{1}{20}< \dfrac{5}{7}\)

b) \(\dfrac{216}{217}< 1\)

\(1< \dfrac{1164}{1163}\)

nên \(\dfrac{216}{217}< \dfrac{1164}{1163}\)

c) \(\dfrac{-12}{17}=\dfrac{-180}{255}\)

\(\dfrac{-14}{15}=\dfrac{-238}{255}\)

mà -180>-238

nên \(-\dfrac{12}{17}>\dfrac{-14}{15}\)

d) \(\dfrac{27}{29}>0\)

\(0>-\dfrac{2727}{2929}\)

nên \(\dfrac{27}{29}>-\dfrac{2727}{2929}\)

a)

\(\dfrac{-2}{3}\)>\(\dfrac{5}{-8}\)

b)

\(\dfrac{398}{-412}\)<\(\dfrac{-25}{-137}\)

c)

\(\dfrac{-14}{21}\)<\(\dfrac{60}{72}\)

\(a,\)

\(3^{200}=3^{2.100}=\left(3^2\right)^{100}=9^{100}\)

\(2^{300}=2^{3.100}=\left(2^3\right)^{100}=8^{100}\)

Vì \(9^{100}>8^{100}\)

\(\Rightarrow3^{200}>2^{300}\)

\(b,\)

\(125^5=\left(5^3\right)^5=5^{15}\)

\(25^7=\left(5^2\right)^7=5^{14}\)

Vì \(5^{15}>5^{14}\)

\(\Rightarrow125^5>25^7\)

3^2*100 và 2^3*100

=6^100   và 6^100

=) 3^200=2^300

\(1,\\ a,2< 3\Rightarrow2^{30}< 3^{30}\Rightarrow-2^{30}>-3^{30}\\ b,6^{10}=6^{2\cdot5}=\left(6^2\right)^5=36^5>35^5\left(36>35\right)\)

\(2,\\ a,\dfrac{\left(-3\right)^{10}\cdot15^5}{25^3\cdot\left(-9\right)^7}=\dfrac{3^{10}\cdot5^5\cdot3^5}{5^6\cdot3^{14}}=\dfrac{3}{5}\\ b,\left(8x-1\right)^{2x+1}=5^{2x+1}\\ \Leftrightarrow8x-1=5\\ \Leftrightarrow x=\dfrac{3}{4}\)

Bài 2: 

a: Ta có: \(\dfrac{\left(-3\right)^{10}\cdot15^5}{25^3\cdot\left(-9\right)^7}\)

\(=\dfrac{-3^{10}\cdot3^5\cdot5^5}{5^6\cdot3^{14}}\)

\(=-\dfrac{3}{5}\)

b: Ta có: \(\left(8x-1\right)^{2x+1}=5^{2x+1}\)

\(\Leftrightarrow8x-1=5\)

\(\Leftrightarrow8x=6\)

hay \(x=\dfrac{3}{4}\)