mohammedafnanahmed20
mohammedafnanahmed20 mohammedafnanahmed20
  • 21-09-2021
  • Mathematics
contestada

Find x so that (-5)^x+1 x (-5)^5 = (-5)^7
pls help its urgent

Respuesta :

rlesandisusanya
rlesandisusanya rlesandisusanya
  • 21-09-2021

Answer:

x = 2

Step-by-step explanation:

[tex] { - 5}^{x} + 1 \times { - 5}^{5} = { - 5}^{7} \\ { - 5}^{x} - {5}^{5} = { - 5}^{7} \\ {5}^{7} - {5}^{5} = {5}^{x} \\ log_{5} \: {5}^{7} - {5}^{5} = x \\ log_{5} \: {5}^{7} - log_{5} \: {5}^{5} = x \\ 7 - 5 = x \\ 2 = x \\ [/tex]

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