Question

resolva as equações irracionais:

a) ³√2x+3= 4

b) 1/√2x = 1/4

Answer 1

Letra


1/2^x= raiz cúbica de 4 (elevo os dois termos a -1)
(1/2^x)-1=(raiz cúbica de 4)^-1
[(1/2)-1]x=[(4)^1/3]-1
2^x=4^-1/3
2^x=[(2^2)]-1/3
2^x=2^-2/3
x=-2/3