a: \(35\cdot20+125:5^2\)

\(=700+\frac{125}{25}\)

=700+5=705

b: \(5^2\cdot8-60:2^2\)

\(=25\cdot8-60:4\)

=200-15

=185

c: \(4500:15+3^4\cdot10\)

=300+81*10

=300+810

=1110

d: \(175-\left\lbrack3\cdot5^2-5\cdot3^2\right\rbrack\)

\(=175-\left(3\cdot25-5\cdot9\right)\)

=175-(75-45)

=175-30

=145

e: 555:5+\(256:16^2\)

=111+256:256

=111+1

=112

3.

a, 4⁵ 

^b,3^3. 5³

4.

a, 3⁹

b, 5⁸

c,2²

k nha 

3.

a) 4.4.4.4.4 = 4⁵

b) 3.3.3.5.5.5 = 3³ . 5³

4.

a) 3⁵ . 3⁴ = 3⁹

b) 5³ . 5⁵ = 5⁸

c) 2²

Hk tốt

c, \(5^{x+4}-3\cdot5^{x+3}=2\cdot5^{11}\)

\(\Leftrightarrow5^{x+3}\cdot5-3\cdot5^{x+3}=2\cdot5^{11}\)

\(\Leftrightarrow5^{x+3}\left(5-3\right)=2\cdot5^{11}\)

\(\Leftrightarrow5^{x+3}\cdot2=2\cdot5^{11}\)

\(\Leftrightarrow5^{x+3}=5^{11}\)

\(\Leftrightarrow x+3=11\)

\(\Leftrightarrow x=8\)

Vậy x = 8

d, \(2^x+2^{x+1}+2^{x+2}+2^{x+3}+2^{x+4}+2^{x+5}=480\)

\(\Leftrightarrow2^x\left(1+2+2^2+2^3+2^4+2^5\right)=480\)

\(\Leftrightarrow2^x\cdot63=480\)

\(\Leftrightarrow2^x=\frac{160}{21}\)

\(\Leftrightarrow x\approx2,93\)

bạn nào chơi ff ko?

\(=\frac{1}{1}-\frac{1}{3}+\frac{1}{3}-\frac{1}{5}+............+\frac{1}{2009}-\frac{1}{2011}=\frac{1}{1}-\frac{1}{2011}=\frac{2010}{2011}\)

sai rồi top scorer ạ tử trừ mẫu là 2 mà tử là 1 phải nhân 2 lên tử

1/-4/10

2/9/5

3/\(\widehat{xOz}\)

1)1/4

2) 9/5

3) k thấy hình nên k trả lời

a) \(3.5^2-16:2^2\)

\(=3.25-16.4\)

\(=75-64\)

\(=11\)

b) \(17.85+15.17-120\)

\(=17.\left(85+15\right)-120\)

\(=17.100-120\)

\(=1700-120\)

\(=1580\)

c) \(\left(3^{15}.4+5.3^{15}\right):3^{16}\)

\(=\left[3^{15}.\left(4+5\right)\right]:3^{16}\)

\(=\left[3^{15}.9\right]:3^{16}\)

\(=\left[3^{15}.3^2\right]:3^{16}\)

\(=3^{17}:3^{16}\)

\(=3\)

a. 3.5² - 2⁴ : 2² = 3.5²- 2² = 3.25-4= 75-4 =71

b. 17.(85+15) - 120 = 17.100-120=1700-120=1580

c. |3¹⁵.(4+5)| :3¹⁶= (3¹⁵.9) : 3¹⁶= 3¹⁵.3² : 3¹⁶= 3¹⁷:3¹⁶=3

dấu | là ngoặc vuông bn nhé

=127346283/17228137

700X700X700X700=700⁴ 

\(700x700x700x700=700^4\)

(72,69+18,47)-(8,47+22,69)=(72,69-22,69)+(18,47-8,47)

                                            =             50     +10 

                                            =60

(72,69+18,47) - ( 8,47 + 22,69)

= ( 72,69 - 22,69) + ( 18,47 - 8, 47 )

= 50 +10

=60