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anonymous

  • 5 years ago

What is 2e^4x minus 2e^-4x?

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  1. myininaya
    • 5 years ago
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    how to factor it? if you want to factor it is e(e^x-e^(-2x))(e^x+e^(-2x))

  2. myininaya
    • 5 years ago
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    oops that first e should be a 2

  3. anonymous
    • 5 years ago
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    no how to subtract it.

  4. myininaya
    • 5 years ago
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    u cant

  5. anonymous
    • 5 years ago
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    Then what do you do?

  6. myininaya
    • 5 years ago
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    what do u mean

  7. myininaya
    • 5 years ago
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    are you trying to show it is equal to something?

  8. anonymous
    • 5 years ago
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    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...

  9. myininaya
    • 5 years ago
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    i get 1/(2e^(4x))*|e^3x e^2x| |-e^2x e^x|

  10. anonymous
    • 5 years ago
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    I have that too. but how do i multiply to get the answer?

  11. myininaya
    • 5 years ago
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    so you want to multiply the scalar inside the matrix

  12. anonymous
    • 5 years ago
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    yes

  13. myininaya
    • 5 years ago
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    ok i get |(1/(2e^x) 1/(2e^x)| |-1/(2e^(2x)) 1/(2e^3x)|

  14. myininaya
    • 5 years ago
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    oops error! the first row first column should be 1/(2e^(2x))

  15. myininaya
    • 5 years ago
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    first row and 2nd column*

  16. myininaya
    • 5 years ago
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    you just multiply each entry by the scalar

  17. anonymous
    • 5 years ago
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    So those are the final answers?

  18. myininaya
    • 5 years ago
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    yes with correction i mentioned

  19. anonymous
    • 5 years ago
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    Thank you so much!!!!

  20. myininaya
    • 5 years ago
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    do you understand how to multiply each entry by the scalar?

  21. myininaya
    • 5 years ago
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    you said that was your problem?

  22. anonymous
    • 5 years ago
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    yes because of the exponentials. If it was regular numbers I could do it.

  23. myininaya
    • 5 years ago
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    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)

  24. myininaya
    • 5 years ago
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    =1/(e^(4x))

  25. myininaya
    • 5 years ago
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    another example: (e^(6x)/e^(2x))=e^(6x-2x)=e^(4x)

  26. anonymous
    • 5 years ago
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    ok i see. thank you! i really appriciate you taking the time to show me.

  27. myininaya
    • 5 years ago
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    np if you want i guess you can be my fan :)

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