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Pertanyaan

Hasil dari ∫ xe 3 x − 4 dx = … + 3 m u .

Hasil dari    

  1. begin mathsize 14px style 1 third straight e to the power of 3 straight x minus 4 end exponent left parenthesis 3 straight x minus 1 right parenthesis plus straight C end style  

  2. begin mathsize 14px style 1 third straight e to the power of 3 straight x minus 4 end exponent left parenthesis straight x minus 3 right parenthesis plus straight C end style   

  3. begin mathsize 14px style 1 over 6 straight e to the power of 3 straight x minus 4 end exponent left parenthesis 3 straight x minus 1 right parenthesis plus straight C end style   

  4. begin mathsize 14px style 1 over 9 straight e to the power of 3 straight x minus 4 end exponent left parenthesis straight x minus 3 right parenthesis plus straight C end style  

  5. begin mathsize 14px style 1 over 9 straight e to the power of 3 straight x minus 4 end exponent left parenthesis 3 straight x minus 1 right parenthesis plus straight C end style   

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N. Rahayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

Jawaban terverifikasi

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Pembahasan

Ingat kembali bahwa integral parsial berikut ini. Perhatikan bentuk integral berikut ini! Misalkan: u = x du = dx Dan Sehingga, Jadi, jawaban yang benar adalah E.

Ingat kembali bahwa integral parsial berikut ini.

begin mathsize 14px style integral straight u space dv equals uv minus integral vdu integral straight e to the power of ax space dx equals 1 over straight a straight e to the power of ax plus straight C end style   

Perhatikan bentuk integral berikut ini!

begin mathsize 14px style integral straight x times straight e to the power of 3 straight x minus 4 end exponent space dx end style   

Misalkan:

u = x
du = dx

Dan

begin mathsize 14px style dv equals straight e to the power of 3 straight x minus 4 end exponent space dx integral dv equals integral straight e to the power of 3 straight x minus 4 end exponent space dx straight v equals 1 third straight e to the power of 3 straight x minus 4 end exponent end style    

Sehingga,

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell integral xe to the power of 3 straight x minus 4 end exponent space dx end cell equals cell straight x times 1 third straight e to the power of 3 straight x minus 4 end exponent minus integral 1 third straight e to the power of 3 straight x minus 4 end exponent space dx end cell row blank equals cell 1 third xe to the power of 3 straight x minus 4 end exponent minus 1 third open parentheses 1 third straight e to the power of 3 straight x minus 4 end exponent close parentheses plus straight C end cell row blank equals cell 1 third xe to the power of 3 straight x minus 4 end exponent minus 1 over 9 straight e to the power of 3 straight x minus 4 end exponent plus straight C end cell row blank equals cell 1 over 9 straight e to the power of 3 straight x minus 4 end exponent left parenthesis 3 straight x minus 1 right parenthesis plus straight C end cell end table end style    

Jadi, jawaban yang benar adalah E. 

 

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