DasonX687446 DasonX687446
  • 29-10-2022
  • Mathematics
contestada

what is the solution to this equation? (1/4) ^x+1 =32 a: 3/2b: 2c: -2d: -7/2

what is the solution to this equation 14 x1 32 a 32b 2c 2d 72 class=

Respuesta :

BrettleyM523006 BrettleyM523006
  • 29-10-2022

Given

[tex](\frac{1}{4})^{x+1}=32[/tex]

Notice that

[tex]\begin{gathered} 32=2^5 \\ and \\ (\frac{1}{4})^{x+1}=\frac{1}{4^{x+1}}=4^{-(x+1)}=4^{-x-1}=2^{-2x-2} \end{gathered}[/tex]

Therefore, the original equation is equivalent to

[tex]\Rightarrow2^{-2x-2}=2^5[/tex]

Solving for x,

[tex]\begin{gathered} \Rightarrow-2x-2=5 \\ \Rightarrow x=-\frac{7}{2} \end{gathered}[/tex]

Therefore, the answer is -7/2, option D.

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