Question

Tìm x

a)3 mũ x + 3 mũ x+1 + 3 mũ x+2 = 1053

b)5 mũ x . 5 mũ 19 = 5 mũ 20 . 5 mũ 11

 

Answer 1

a. 3^x+3^x+1+3^x+2=1053

=> 3^x.(1+3+3²)=1053

=> 3^x.(1+3+9)=1053

=> 3^x.13=1053

=> 3^x=1053:13

=> 3^x=81

=> 3^x=3⁴

=> x=4

b. 5^x.5¹⁹=5²⁰.5¹¹

=> 5^19+x=5²⁰⁺¹¹

=> 19+x=20+11

=> 19+x=31

=> x=31-19

=> x=12

Answer 2

\(3^x+3^{x+1}+3^{x+2}=1053\)

\(3^x\left(1+3+3^2\right)=1053\)

\(3^x\cdot13=1053\)

\(3^x=1053:13=81\)

\(3^x=3^4\)

=> x = 4 

Answer 3

A)x=4

B)x=12 100% đó

Answer 4

a) 3^x+3^x+1+3^x+2=1053

3^x(1+3+3²)=1053

3^x*13=1053

3^x=81

3^x=3⁴

x=4

Vậy x=4

Chúc bạn học giỏi !!!!!!!

Answer 5

5.3 mũ x cộng 1=135