Question

log2^x+ log(1+2^x)= log20

Answer 1

olá Camila....

log2^x+ log(1+2^x)= log20
log (2^x. (1+2^x))=log (20)
log (2^x+4)=log (20)
2^x+4^x=20
2^x×(2^x)^2=20
t+t=20
t=4
t=-5
2^x=4
2^=-5
x=2
×eø
x=2

espero ter ajudado....❤

Answer 2

Resposta:

og2^x+ log(1+2^x)= log20

log (2^x. (1+2^x))=log (20)

log (2^x+4)=log (20)

2^x+4^x=20

2^x×(2^x)^2=20

t+t=20

t=4

t=-5

2^x=4

2^=-5

x=2

×eø

x=2