152+163-123+256-145=303

=303 nhớ k cho mk nha

152+163-123+256-145=303

a) x + 156 = 189 +862

x + 156 = 1051

x = 1051 - 156 

x = 895

 Vậy x= 859

b) x + 256 = 459 - 152

x + 256 = 307

x = 307 - 256 

x= 51

Vậy x = 51

Đặt A=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256

A=1/2¹+1/2²+1/2³+1/2⁴+1/2⁵+1/2⁶+1/2⁷+1/2⁸

1/2A=1/2²+1/2³+1/2⁴+1/2⁵+1/2⁶+1/2⁷+1/2⁸+1/2⁹

A-1/2A=(1/2+1/2²+1/2³+1/2⁴+1/2⁵+1/2⁶+1/2⁷+1/2⁸)-(1/2²+1/2³+1/2⁴+1/2⁵+1/2⁶+1/2⁷+1/2⁸+1/2⁹)

1/2A=1/2-1/2⁹

A=2(1/2-1/2⁹)

A=1-1/2⁸

A=2⁸-1

a: 312; 256; 8190; 5794; 71118; 36580

b: 55; 495; 8190; 6825; 36580

c: 8190; 36580

d: 312; 256; 5794; 71118

e: 55; 495; 6825

f: 312; 81; 495; 8190; 6825; 71118

a, 312,256,8190,5794,71118,36580

b, 55,495,8190,6825,36580

c, 8190,36580

d, 312,256,5794,71118

e, 55,495,6825

f, 81,312,495,8190,6825,71118

g, 81,495,8190,71118

h,312,6825

i,8190

a, 312, 256, 8190, 5794, 71118, 36580.

b, 55, 495, 8190, 6825, 36580.

c, 8190, 36580.

d, 312, 256,  5794, 71118.

e, 55, 495, 6825.

a, 45

b, 230

c, 1,320

d, 19,688

Bài 1:

a, \(64^2=\left(2^6\right)^2=2^{12}\)

\(32^5=\left(2^5\right)^5=2^{25}\)

\(2^{12}< 2^{25}\Rightarrow64^2< 32^5\)

b, \(10^5=\left(5.2\right)^5=5^5.2^5\)

\(5^{10}=5^{5+5}=5^5.5^5\)

\(5^5.2^5< 5^5.5^5\Rightarrow10^5< 5^{10}\)

c, 256^ mấy thế hả bạn?

d, \(9^{200}=\left(9^2\right)^{100}=81^{100}\)

\(81^{100}>10^{100}\Rightarrow9^{200}>10^{100}\)

Bài 2:

\(9.27^2.81^3.216\)

\(=3^2.\left(3^3\right)^2.\left(3^4\right)^3.2^3.3^3\)

\(=3^2.3^6.3^{12}.3^3.2^3\)

\(=3^{2+6+12+3}.2^3\)

\(=3^{23}.2^3\)