Question

SO SÁNH :

 \(10^{30}\) va   \(2^{100}\)

\(5^{40}\) va  \(620^{10}\)

\(10^{20}\) va  \(90^{10}\)

 

Answer 1

5⁴⁰ = (5⁴)¹⁰ = 625¹⁰ và 620¹⁰

Vì 625 > 620 => 5⁴⁰ > 620¹⁰

10²⁰ = (10²)¹⁰ = 100¹⁰ và 90¹⁰

Vì 100 > 90 nên 10²⁰ > 90¹⁰

Answer 2

a)Ta có:10³⁰=10^3.10=(10³)¹⁰=1000¹⁰                                                    b)Ta có:5⁴⁰=5^4.10=(5⁴)¹⁰=625¹⁰

2¹⁰⁰=2^10.10=(2¹⁰)¹⁰=1024¹⁰                                                       Vì 625¹⁰>620¹⁰

Vì 1000¹⁰<1024¹⁰                                                                     nên 5⁴⁰>620¹⁰

nên 10³⁰<2¹⁰⁰

                                  c)Ta có :10²⁰=10^2.10=(10²)¹⁰=100¹⁰

                                   Vì 100¹⁰>90¹⁰

                                   nên 10²⁰>90¹⁰
 

Answer 3

B, 5⁴⁰và 620¹⁰ 

Ta có: 5⁴⁰= (5⁴)¹⁰ = 625¹⁰

mà 625¹⁰ > 620¹⁰

Vậy 5⁴⁰ > 620¹⁰

Answer 4

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