Question

1-Resolva as equaçoes exponenciais a seguir:
a)$3^{2+5x} =9$
b)$8^{3x+4} =16$
c)$125^{5x+7} =625$
d)$10^{x} =1000$

Answer 1

a)  $3^{2+5x}$ =  $3^{2}$ $[/tex] 2+ 5x = 2  5x = 0 x=0 b) [tex]2^{3*(3x+4)}$  =$2^{4}$ 
9x+12 = 4
9x= -8
x = -8/9
c) ($5^{3*(5x+7)}$)  = $5^{4}$
15x + 21 = 4
15x = -17
x= -17/15
d)$10^{x}$ = $10^{3}$ 
x=3