a) Ta có :

\(27^{27}>27^{26}=\left(27^2\right)^{13}=729^{13}>243^{13}\)

\(\Rightarrow27^{27}>243^{13}\)

\(\Rightarrow-27^{27}< -243^{13}\)

\(\Rightarrow\left(-27\right)^{27}< \left(-243\right)^{13}\)

b) \(\left(\dfrac{1}{8}\right)^{25}>\left(\dfrac{1}{8}\right)^{26}=\left(\dfrac{1}{8^2}\right)^{13}=\left(\dfrac{1}{64}\right)^{13}>\left(\dfrac{1}{128}\right)^{13}\)

\(\Rightarrow\left(\dfrac{1}{8}\right)^{25}>\left(\dfrac{1}{128}\right)^{13}\)

\(\Rightarrow\left(-\dfrac{1}{8}\right)^{25}< \left(-\dfrac{1}{128}\right)^{13}\)

c) \(4^{50}=\left(4^5\right)^{10}=1024^{10}\)

\(8^{30}=\left(8^3\right)^{10}=512^{10}< 1024^{10}\)

\(\Rightarrow4^{50}>8^{30}\)

d) \(\left(\dfrac{1}{9}\right)^{17}< \left(\dfrac{1}{9}\right)^{12}< \left(\dfrac{1}{27}\right)^{12}\)

\(\Rightarrow\left(\dfrac{1}{9}\right)^{17}< \left(\dfrac{1}{27}\right)^{12}\)

a) Ta có :

2727>2726=(272)13=72913>243132727>2726=(272)13=72913>24313

⇒2727>24313⇒2727>24313

⇒−2727<−24313⇒−2727<−24313

⇒(−27)27<(−243)13⇒(−27)27<(−243)13

b) (18)25>(18)26=(182)13=(164)13>(1128)13(81​)25>(81​)26=(821​)13=(641​)13>(1281​)13

⇒(18)25>(1128)13⇒(81​)25>(1281​)13

⇒(−18)25<(−1128)13⇒(−81​)25<(−1281​)13

c) 450=(45)10=102410450=(45)10=102410

830=(83)10=51210<102410830=(83)10=51210<102410

⇒450>830⇒450>830

d) (19)17<(19)12<(127)12(91​)17<(91​)12<(271​)12

⇒(19)17<(127)12⇒(91​)17<(271​)12

a) Vì \(-45< -16\) nên \(\left(-\dfrac{45}{17}\right)^{15}< \left(\dfrac{-16}{17}\right)^{15}\)

b) Vì \(21< 23\) nên \(\left(-\dfrac{8}{9}\right)^{21}< \left(-\dfrac{8}{9}\right)^{23}\)

c) \(27^{40}=3^{3^{40}}=3^{120}\)

\(64^{60}=8^{2^{60}}=8^{120}\)

Vì \(3< 8\) nên \(3^{120}< 8^{120}\) hay \(27^{40}< 64^{60}\)

con ai kooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

co don quaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Mik nhầm sang Ngữ Văn rùi huhu

Mời thí chủ nhận bài:)), sai nhớ bảo tôi thí chủ đừng giấu:))
Ta có: 9³⁰= (3²)³⁰ = 3⁶⁰

27²⁰= (3³)²⁰ = 3⁶⁰

 9³⁰ = 27²⁰

so sánh 2²¹⁰ và 5¹⁴⁰

Ta có: 2²¹⁰= (2³)⁷⁰ = 8⁷⁰

5¹⁴⁰ = (5²)⁷⁰=25⁷⁰

Mà : 8⁷⁰ < 25⁷⁰

 2²¹⁰<5¹⁴⁰

\(9^{30}=\left(3^2\right)^{30}=3^{60}\)

\(27^{20}=\left(3^3\right)^{20}=3^{60}\)

\(3^{60}=3^{60}\)⇒\(9^{30}=27^{20}\)

9³<27³

nhé bạn

*** mk nha

27^3>9^3 mik ủng hộ bạn cảm ơn trước

27 mu 3 lon hon 9 mu 3

31mu 17 lon hon

mình cần lời giải nha các bạn

Bạn có biết so sánh tg ko

Có: \(^{9^{36}}\)=\(^{\left(3^2\right)^{36}}\)=\(3^{72}\)

       \(27^{10}\)=\(\left(3^3\right)^{10}\)=\(3^{30}\)

Vì 3 mũ 72 > 3 mũ 30 suy ra 9 mũ 36 > 27 mũ 10

9^36=(3^3)^36=3^108

27^10=(3^9)^10=3^90

Suy ra 9^36>27^10