Question

2.5^x+3.5^x+1=17
pfv me ajudem,é a 6 e a 7

Answer 1

  $2. x^{5} +3. 5^{x+1} =17$

$5^{x} (2+3. 5^{1} )=17$

$5^{x} .17=17--\ \textgreater \ 5^{x} = \frac{17}{17} --\ \textgreater \ 5^{x} =1--\ \textgreater \ 5^{x} =5^0$ <-- bases iguais, iguala os expoentes
x = 0