Question

Resolva as equaçoes exponenciais
a) 2x+1 - 2x-1+2x-2



b) 2.4x +4=9.2x

Answer 1

a) 2x +1 - 2x -1 + 2x - 2 = 0
2x - 2 = 0
2x = 2
x = 2/2
x = 1

b) 2.4x + 4 = 9.2x
8x + 4 = 18x
8x - 18x = - 4
- 10x = -4
10x = 4
x = 4/10 (÷2)
x = 2/5