biết gì ?

9147-x:409=89²-10²

9147-x:409=7921-100

x:409=9147-7821

x=1226x409

x=501434

Vay x=501434

a) <=> 48 + 288 : ( x - 3 )² = 50

<=> 288 : ( x - 3 )² = 50 - 48 = 2

<=> ( x - 3 )² = 288 : 2 = 144 = 12²

<=> x - 3 = 12

=> x = 12 + 3 = 15

Đ/s là 15 nha

2^2=4

2^3=8

2^4=16

2^5=256

2^6=512

2^7=1024

2^8=2048

2^9=4096

2^10=8192

a) 2² = 2.2 = 4

2³ = 2.2.2 = 8

2⁴ = 2.2.2.2 = 16

2⁵ = 2.2.2.2.2 = 32

2⁶ = 2.2.2.2.2.2 = 64

2⁷ = 2.2.2.2.2.2.2 = 128

2⁸ = 2.2.2.2.2.2.2.2 = 256

2⁹ = 2.2.2.2.2.2.2.2.2 = 512

2¹⁰ = 2.2.2.2.2.2.2.2.2.2 = 1024

b) 3² = 3.3 = 9

3³ = 3.3.3 = 27

3⁴ = 3.3.3.3 = 81

3⁵ = 3.3.3.3.3 = 243

3⁶ = 3.3.3.3.3.3 = 729

3⁷ = 3.3.3.3.3.3.3 = 2187

3⁸ = 3.3.3.3.3.3.3.3 = 6561

3⁹ = 3.3.3.3.3.3.3.3.3 = 19683

3¹⁰ = 3.3.3.3.3.3.3.3.3.3 =  59049

c) 4² = 4.4 = 16

4³ = 4.4.4 = 64

4⁴ = 4.4.4.4 = 256

4⁵ = 4.4.4.4.4 = 1024

4⁶ = 4.4.4.4.4.4 = 4096

4⁷ = 4.4.4.4.4.4.4 = 16384

4⁸ = 4.4.4.4.4.4.4.4 = 65536

4⁹ = 4.4.4.4.4.4.4.4.4 = 262144

4¹⁰ = 4.4.4.4.4.4.4.4.4.4 = 1048576

c) 5² = 5.5 = 25

5³ = 5.5.5 = 125

5⁴ = 5.5.5.5 = 625

5⁵ = 5.5.5.5.5 = 3125

5⁶ = 5.5.5.5.5.5 = 15625

5⁷ = 5.5.5.5.5.5.5 = 78125

5⁸ = 5.5.5.5.5.5.5.5 = 390625

5⁹ = 5.5.5.5.5.5.5.5.5 = 1953125

5¹⁰ = 5.5.5.5.5.5.5.5.5.5 = 9765625

hinh nhu sai de rui thi phai

+Ta co : 72⁴⁵-7⁴⁴=72¹=72

              72⁴⁴-72⁴³=72¹=72

Do 72=72

Vay 72⁴⁵-72⁴⁴=72⁴⁴-72⁴³

\(72^{45}-72^{44}=72^{44}\left(72-1\right)=72^{44}.71\)

\(72^{44}-72^{43}=72^{43}\left(72-1\right)=72^{43}.71\)

\(Vì\) \(72^{44}.71>72^{43}.71\)

\(\Rightarrow72^{45}-72^{44}>72^{44}-72^{43}\)

2^x+2 - 2^x = 96

2^x . 2² - 2^x . 1 = 96

2^x . ( 2² - 1 ) = 96

2^x . 3 = 96

2^x = 32

2^x = 2⁵

=> x = 5

hok tốt

\(2^{x+2}-2^x=96\)

\(\Rightarrow2^x.\left(2^2-1\right)=96\)

\(\Rightarrow2^x.3=96\)

\(\Rightarrow2^x=96:3=32=2^5\)

\(\Rightarrow x=5\)

569 ( x + 10 ) = 454

569 x + 5690 = 454

569x = 454 - 5690 = -5236

x = -5336 / 569

x=-9.20(làm tròn rồi nha)

k mik nha

Học tốt

^_^

x=10,17(làm tròn nha)

k mik nha

học tốt

^_^

\(575-6.\left(x+10\right)=454\)

\(\Rightarrow6.\left(x+10\right)=575-454=121\)

\(\Rightarrow x+10=\frac{121}{6}\)

\(\Rightarrow x=\frac{121}{6}-10=\frac{121}{6}-\frac{60}{6}\)

\(\Rightarrow x=\frac{61}{6}\)