Question

2.3^x+1 = 10. 3¹² + 8. 3¹²

Answer 1

\(2.3^{x+1}=10.3^{12}+8.3^{12}\\ VP=\left(10+8\right).3^{12}=18.3^{12}=2.3^2.3^{12}\\ =2.3^{2+12}=2.3^{14}\\ VT=VP\\ \Rightarrow2.3^{x+1}=2.3^{14}\\ \Rightarrow x+1=14\\ Vậy:x=14-1=13\)

Answer 2

2.3ˣ⁺¹ = 10.3¹² + 8.3¹²

2.3ˣ⁺¹ = 3¹².(10 + 8)

2.3ˣ⁺¹ = 3¹².18

3ˣ⁺¹ = 3¹².18 : 2

3ˣ⁺¹ = 3¹².9

3ˣ⁺¹ = 3¹².3²

3ˣ⁺¹ = 3¹⁴

x + 1 = 14

x = 14 - 1

x = 13

Answer 3

\(2\cdot3^{x+1}=10\cdot3^{12}+8\cdot3^{12}\\\Rightarrow 2\cdot3^{x+1}=3^{12}\cdot(10+8)\\\Rightarrow 2\cdot3^{x+1}=3^{12}\cdot18\\\Rightarrow 2\cdot3^{x+1}=3^{12}\cdot3^2\cdot2\\\Rightarrow 3^{x+1}=3^{12}\cdot3^2\\\Rightarrow 3^{x+1}=3^{14}\\\Rightarrow x+1=14\\\Rightarrow x=14-1\\\Rightarrow x=13\\Vậy:x=13\)

Answer 4

tìm x

 

Answer 5

Sao bấm gửi bài 1 lần mà ra 2 làn vậy ta? 😆