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KimJ

  • 3 years ago

im having a problem understanding integration by substitution. For intance, ∫4xe^(x^2+3)dx. The answer is 2e^(x^2+3) and I am not sure where the 2 comes from.

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  1. amarhooda111
    • 3 years ago
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    put x^2+3=t so that 2x dx=dt that eq becomes int 2e^t dt =2e^t so that 2 comes in answer.

  2. Krishnadas
    • 3 years ago
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    |dw:1355916232531:dw|

  3. Krishnadas
    • 3 years ago
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    thats how the 2 comes!

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