Question

Equaçao Exponencial

A) 9^2x-1=1

B) 6.7^x-3=294

C) 3^1+x=324-3^x


Gnt se n for rsponder ñ atrapalhe pf.

Answer 1

Ola Ana

A) 

9^(2x - 1) = 1 = 9^0

2x - 1 = 0
2x = 1
x = 1/2

B)

6*7^(x - 3) = 294

7^(x - 3) = 294/6 = 49 = 7^2

x - 3 = 2
x = 2 + 3 = 5

C)

3^(1+x)  = 324 -3^x

3*3^x + 3^x = 324 

4*3^x = 324

3^x = 324/4 = 81 = 3^4

x = 4

.

Answer 2

3² (2x-1) = 1^0
3^( 4x - 2) = 3^0
4x - 2 =  0
4x = 2
x = 2/4 = 1/2 *****
b
6 * 7^( x-3) = 294
 7 ^(x-3) = 294/6 
7^( x - 3) = 49 ou  7²
7^( x - 3) = 7²
x - 3 = 2
x = 3 + 2
x = 5 ******