Question

1- Resolva as equações exponenciais em R:
a) 2x= 8
b) 3 x+5 = 3 elevado 5
c) 243+ 3 x+2
d) 5x= 1/125

Answer 1

A) 2x=8
x=8/2
x=4

B) 3x+5=125
3x=125-5
x=120/3
x=40

C)243+3x+2
245+3x
3x=-245
x=-245/3
x= -81,6666...

D) 5x=1/125
x=0,008/5
x= 0,0016

Answer 2

a) 2x= 8 
x = 8/2
x = 4
b) 3 x+5 = 3 elevado 5
3x+5=243
3x=243-5
3x=238
x=238/3
x=79.3
c) 243+ 3 x+2
3x = -243 -2
3x = -245
x = -245/3
x = -81.6
d) 5x= 1/1255x = 0.008
x = 0.008/5
x = 0.0016