Phép tính tám nhân năm mũ hai trừ một trăm tám chín chia ba mũ hai bằng bao nhiêu?

\(8\cdot5^2-189:3^2\\ =8\cdot25-189:9\\ =200-21\\ =179\)

HT

   234 - ( 56 + 24 : 4 )
=234 - ( 56 + 6 )
=234 - 62
=172
 

  100 : { 250 : [ 450 - ( 500 - 2² . 25) ] }
=100 : { 250 : [ 450 - ( 500 - 4 . 25) ] }
=100 : { 250 : [ 450 - ( 500 - 100) ] }
=100 : { 250 :  [ 450 - 400] }
=100 : { 250 : 50}
=100 : 5
=20

Câu 1:

1;   125 : 5²

   =   5³ : 5²

   =      5¹

2; 27⁵ : 81³

 = (3³)⁵ : (3⁴)³

 = 3¹⁵ : 3¹²

= 3³ 

3; 8⁴.16⁵.32

= (2³)⁴.(2⁴)⁵.2⁵

= 2¹².2²⁰.2⁵

= 2³⁷

Câu 1

4; 27⁴.81¹⁰

= (3³)⁴.(3⁴)¹⁰

= 3¹².3⁴⁰

= 3⁵²

Câu 2:

1; 125⁵ = (5³)⁵ = 5¹⁵

    25⁵ = (5²)⁵ = 5¹⁰ < 5¹⁵ < 125⁵

2; 3²⁰⁰ = (3²)¹⁰⁰ = 9¹⁰⁰

     2³⁰⁰ = (2³)¹⁰⁰ = 8¹⁰⁰ < 9¹⁰⁰ < 3²⁰⁰

\(27^5\cdot32^3=\left(3^3\right)^5\cdot\left(2^5\right)^3=3^{15}\cdot2^{15}=\left(2\cdot3\right)^{15}=6^{15}\)

20\(^5\)x32\(^3\)=1,048576_x10¹¹

a, 2^3=8, 2^4=16,2^5=32, 2^6=64, 2^7=128, 2^8=256, 2^9=512, 2^10=1024

b, 3^2=9, 3^3=27, 3^4=81, 3^5=243

c, 4^2=16, 4^3=64, 4^4=256

d, 5^2=25, 5^3=125, 5^4=625

e, 6^2=36, 6^3=216, 6^4= 1296

\(\frac{1}{2}.2^n+2^{2+n}=9.2^5\)

\(\frac{1}{2}.2^n+4.2^n=9.2^5\)

\(2^n.\left(\frac{1}{2}+4\right)=9.2^5\)

\(2^n.\frac{9}{2}=9.2^5\)

\(2^n=9.\frac{2}{9}.2^5\)

\(2^n=2.2^5\)

\(2^n=2^6\)

\(\Rightarrow n=6\)

\(\frac{1}{2}\)\(\times\)\(2^n\)\(+\)\(2^{2+n}\)\(=\)\(9\)\(\times\)\(2^5\)

\(\frac{1}{2}\)\(\times\)\(2^n\)\(\times\)\((\)\(1\)\(+\)\(2^2\)\()\)\(=\)\(9\)\(\times\)\(2^5\)

\(\frac{1}{2}\)\(\times\)\(2^n\)\(\times\)\(5\)\(=\)\(9\)\(\times\)\(2^5\)

\(2^n\)\(=\)\(9\)\(\times\)\(32\)\(\div\)\(5\)\(\times\)\(2\)

\(2^n\)\(=\)115,2