anonymous
  • anonymous
What is 2e^4x minus 2e^-4x?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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myininaya
  • myininaya
how to factor it? if you want to factor it is e(e^x-e^(-2x))(e^x+e^(-2x))
myininaya
  • myininaya
oops that first e should be a 2
anonymous
  • anonymous
no how to subtract it.

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myininaya
  • myininaya
u cant
anonymous
  • anonymous
Then what do you do?
myininaya
  • myininaya
what do u mean
myininaya
  • myininaya
are you trying to show it is equal to something?
anonymous
  • anonymous
I got it when i was try to solve this matrix inverse problem Find the inverse of the matrix if it exist. |e^x -e^2x| |e^2x e^3x| It may be wrong though...
myininaya
  • myininaya
i get 1/(2e^(4x))*|e^3x e^2x| |-e^2x e^x|
anonymous
  • anonymous
I have that too. but how do i multiply to get the answer?
myininaya
  • myininaya
so you want to multiply the scalar inside the matrix
anonymous
  • anonymous
yes
myininaya
  • myininaya
ok i get |(1/(2e^x) 1/(2e^x)| |-1/(2e^(2x)) 1/(2e^3x)|
myininaya
  • myininaya
oops error! the first row first column should be 1/(2e^(2x))
myininaya
  • myininaya
first row and 2nd column*
myininaya
  • myininaya
you just multiply each entry by the scalar
anonymous
  • anonymous
So those are the final answers?
myininaya
  • myininaya
yes with correction i mentioned
anonymous
  • anonymous
Thank you so much!!!!
myininaya
  • myininaya
do you understand how to multiply each entry by the scalar?
myininaya
  • myininaya
you said that was your problem?
anonymous
  • anonymous
yes because of the exponentials. If it was regular numbers I could do it.
myininaya
  • myininaya
since the bases are the same law of exponents tell us to subtract the bottom exponent from the top exponent if we get a negative, usually people write it as a positive by flipping it for example (e^(2x)/e^(6x))=e^(2x-6x)=e^(-4x)
myininaya
  • myininaya
=1/(e^(4x))
myininaya
  • myininaya
another example: (e^(6x)/e^(2x))=e^(6x-2x)=e^(4x)
anonymous
  • anonymous
ok i see. thank you! i really appriciate you taking the time to show me.
myininaya
  • myininaya
np if you want i guess you can be my fan :)

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