7^2x(1+ 49) = 2450

7^2x = 2450/50 = 49 = 7²

2x = 2

x = 1

không có x vì 7²⁺7²⁺²⁼2450

7^2x + 7^2x+2= 2450

1.7^2x + 7^2x+7²=2450

7^2x.(1+7²)=2450

7^2x.(1+49)=2450

7^2x.50 = 2450

7^2x=2450:50

7^2x=49

49=7²

2x=2

x=2:2

x=1

\(7^{2x}+7^{2x+2}=2450\)

\(\Rightarrow7^{2x}+7^{2x}\times7^2=2450\)

\(\Rightarrow7^{2x}\times\left(1+7^2\right)=2450\)

\(\Rightarrow7^{2x}\times50=2450\)

\(\Rightarrow7^{2x}=49\)

\(\Rightarrow7^{2x}=7^2\)

\(\Rightarrow2x=2\)

\(\Rightarrow x=2:2\)

\(\Rightarrow x=1\)

Vậy x = 1

_Chúc bạn học tốt_

\(7^{2x}+7^{2x+2}=2450\)

\(7^{2x}\left(1+7^2\right)=2450\)

\(7^{2x}=2450\div50\)

\(7^{2x}=49\)

\(\Rightarrow2x=2\)

\(\Leftrightarrow x=1\)

\(7^{2x}+7^{2x+2}=2450\)

\(\Leftrightarrow7^{2x}+7^{2x}.7^2=2450\)

\(\Leftrightarrow7^{2x}\left(1+7^2\right)=2450\)

\(\Leftrightarrow49^x\left(1+49\right)=2450\)

\(\Leftrightarrow49^x.50=2450\)

\(\Leftrightarrow49^x=2450:50\)

\(\Leftrightarrow49^x=49\)

\(\Rightarrow x=1\)

vậy x=1

7^2x + 7^2x+2 = 2450
1.7^2x + 7^2x.7² = 2450
7^2x.(1+7²) = 2450
7^2x.(1+49) = 2450
7^2x.50       = 2450
7^2x            = 2450 : 50
7^2x            = 49
7^2x            = 7²
  2x           = 2
    x           = ... (Tự tính)
Vậy x = ...
 

\(7^{2x}+7^{2x+2}=2450\)

\(1\times7^{2x}+7^{2x}\times7^2=2450\)

\(7^{2x}\left(1+7^2\right)=2450\)

\(\frac{7^{2x}\left(1+7^2\right)}{1+7^2}=\frac{2450}{1+7^2}\)

\(7^{2x}=\frac{2450}{1+49}\)

\(7^{2x}=\frac{2450}{50}\)

\(7^{2x}=49\)

\(7^{2x}=7^2\)

\(2x=2\)

\(x=2\div2\)

\(x=1\)

Học tốt nha.

7^2x(1+7²)=2450

7^2x.50=2450

7^2x=2450 : 50 = 49 = 7²

=> 2x=2 => x=1

Vậy x=1

7^2x(1+7²)=2450

7^2x.(1+49)=2450

7^2x.50=2450

7^2x =2450:50

7^2x =49

7^2x =7²

7² =7²

=>x=1

7^2x+7^2x+2=2450

7^2x+7^2x.7²=2450

7^2x.(1+7²)=2450

7^2x.50=2450

7^2x     =2450:50

7^2x    =49

7^2x    =7^2.1

=>x=1

Chuc bn hoc tot

\(7^{2x}+7^{2x+2}=2450\)

\(7^{2x}+7^{2x}\times7^2=2450\)

\(7^{2x}\left(1+49\right)=2450\)

\(7^{2x}=2450\div50\)

\(7^{2x}=49\)

\(7^{2x}=7^2\)

\(\Rightarrow2x=2\Leftrightarrow x=1\)

\(7^{2x}+7^{2x+2}=2450\)

\(\Rightarrow7^{2x}+7^{2x}\cdot7^2=2450\)

\(\Rightarrow7^{2x}\cdot\left(1+49\right)=2450\)

\(\Rightarrow7^{2x}=2450:50=49\)

\(\Rightarrow7^{2x}=7^2\)

\(\Rightarrow2x=2\)

\(\Rightarrow x=1\)

7^2x + 7^{2x + 2} = 2450

7^2x + 7^2x.7² = 2450

7^2x.(1 + 7²) = 2450

7^2x.50 = 2450

7^2x = 2450 : 50

7^2x = 49

7^2x = 7²

2x = 2

x = 1

    7^2x+7^2x+2=2450

=>7^2x(1+7²)=2450

=>7^2x.50=2450 

=>7^2x=2450/50 

=>7^2x =49=7²

=>2x=2

=>x=1

                 Vậy x=1

7^2x +7^2x+2=7² + 7⁴

2x+2x+2=2+4

4x=4

x=1

k cho mk nha!!!

x = 1 nha bạn .