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\(\left(7x-11\right)^3=2^5.5^26+200\)

= \(\left(7x-11\right)^3=1000\)

= \(\left(7x-11\right)^3=10^3\)

= \(\left(7x-11\right)=10\)

= \(7x=10+11\)

= \(7x=21\)

=> \(x=21:7\)

=> x = 3 

Bạn thử vào x chắc chắn đúng 99,9%

= \(\left(7.x-11\right)^3=1000\)

= \(\left(7.x\right)^3=1000+11=1011\)

= \(\left(7.x\right)^3=1011\)

= \(1011:7=\frac{1011}{7}\)

= \(x^3=\frac{1011}{7}=1,433790434\)

Lộn x = 3 

\(\Leftrightarrow7x-11=20\)

hay x=31/7

a: \(\Leftrightarrow73-x=67\)

hay x=6

a)(7^x-11)^3=2^5.5^2+200

<=>(7^x-11)³=32*25+200

<=>(7^x-11)³=1000

<=>(7^x-11)³=10³

<=>7^x-11=10

<=>7^x=21

Đề sai à bạn

b)x^10=1^x

<=>x¹⁰-1^x=0

<=>(x-1)(x+1)(x⁴-x³+x²-x+1)(x⁴+x³+x²+x+1)=0

<=>x=1 hoặc -1 (vì lp 6 chưa học nghiệm số phức)

c)x^10=x

<=>x¹⁰-x=0

<=>x(x⁹-1)=0

<=>x=0 hoặc x⁹-1=0

<=>x=0 hoặc 1

a)(7^x-11)^3=2^5.5^2+200

<=>(7^x-11)³=32*25+200

<=>(7^x-11)³=1000

<=>(7^x-11)³=10³

<=>7^x-11=10

<=>7^x=21

Đề sai à bạn

b)x^10=1^x

<=>x¹⁰-1^x=0

<=>(x-1)(x+1)(x⁴-x³+x²-x+1)(x⁴+x³+x²+x+1)=0

<=>x=1 hoặc -1 (vì lp 6 chưa học nghiệm số phức)

c)x^10=x

<=>x¹⁰-x=0

<=>x(x⁹-1)=0

<=>x=0 hoặc x⁹-1=0

<=>x=0 hoặc 1

a)(7^x-11)^3=2^5.5^2+200

<=>(7^x-11)³=32*25+200

<=>(7^x-11)³=1000

<=>(7^x-11)³=10³

<=>7^x-11=10

<=>7^x=21

Đề sai à bạn

b)x^10=1^x

<=>x¹⁰-1^x=0

<=>(x-1)(x+1)(x⁴-x³+x²-x+1)(x⁴+x³+x²+x+1)=0

<=>x=1 hoặc -1 (vì lp 6 chưa học nghiệm số phức)

c)x^10=x

<=>x¹⁰-x=0

<=>x(x⁹-1)=0

<=>x=0 hoặc x⁹-1=0

<=>x=0 hoặc 1

\(\left(7x-11\right)^3=2^5.5^2+200\)

\(\Leftrightarrow\left(7x-11\right)^3=1000\)

\(\Leftrightarrow7x-11=10\)

\(\Leftrightarrow7x=21\)

\(\Leftrightarrow x=3\)

\(\left(7x-11\right)^3=2^5.5^2+200\)

\(\Rightarrow\left(7x-11\right)^3=32.25+200\)

\(\Rightarrow\left(7x-11\right)^3=800+200\)

\(\Rightarrow\left(7x-11\right)^3=1000=10^3\)

\(\Rightarrow7x-11=10\)

\(\Rightarrow7x=21\)

\(\Rightarrow x=3\)

\(\left(7x-11\right)^3=2^5.5^2+200\)

\(\Rightarrow\left(7x-11\right)^3=32.25+200\)

\(\Rightarrow\left(7x-11\right)^3=800+200\)

\(\Rightarrow\left(7x-11\right)^3=1000=10^3\)

\(\Rightarrow7x-11=10\)

\(\Rightarrow7x=21\)

\(\Rightarrow x=3\)

Ta có: \(\left(7x-11\right)^3=2^5+5^2+200=1000\)

\(\Rightarrow\left(7x-11\right)^3=10^3\)

\(\Rightarrow7x-11=10\)

\(\Rightarrow7x=21\)

\(\Rightarrow x=3\)

Trả lời:

\(\left(7x-11\right)^3=2^5.5^2+200\)

\(\Leftrightarrow\left(7x-11\right)^3=32.25+200\)

\(\Leftrightarrow\left(7x-11\right)^3=800+200\)

\(\Leftrightarrow\left(7x-11\right)^3=1000\)

\(\Leftrightarrow7x-11=10\)

\(\Leftrightarrow7x=21\)

\(\Leftrightarrow x=3\)

Vậy\(x=3\)

Hok tốt!

Good girl

\(\left(7\text{x}-11\right)^3=2^5\text{ }.\text{ }5^2+200.\)

\(\left(7\text{x}-11\right)^3=32\text{ }.\text{ }25+200.\)

\(\left(7\text{x}-11\right)^3=800+200.\)

\(\left(7\text{x}-11\right)^3=1000.\)

\(\left(7\text{x}-11\right)^3=10^3.\)

\(\Rightarrow\text{ }\text{7x}-11=10.\)

\(\text{7x}=10+11\)

\(\text{7x}=21\)

\(x=21\div7\)

\(x=3\)

Vậy \(x=3\)

\(\Leftrightarrow\left(7x-11\right)^3=32\cdot25+200=1000\)

=>7x-11=10

=>x=3

2.3^x=162

3^x=162:2

3^x=81

3^x=3⁴

=>x=4

2^x-15=17

2^x=17+15

2^x=32

2^x=2⁵

=>x=5

(7x-11)³=2⁵.5²+200

(7x-11)³=1000

(7x-11)³=10³

7x-11=10

7x=10+11

7x=21

x=21:7

x=3

(7x-11)³=2⁵.5²+200

(7x-11)³=1000

(7x-11)³=10³

7x-11=10

7x=10+11

7x=21

x=21:7

x=3

( 7x - 11 ) ³ = 32 . 25 + 200

( 7x - 11 ) ³ = 800 + 200

( 7x - 11 ) ³ = 1000

( 7x - 11 ) ³ = 10³

7x - 11 = 10

7x = 10 + 11

7x = 21

x = 21 : 7

x = 3