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Tentukan nilai n jika diketahui: P ( n , 13 ) ​ : P ( n + 1 , 12 ) ​ = 3 : 4

Tentukan nilai  jika diketahui:
 

  1. ...undefined 

  2. ...undefined 

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I. Ridha

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

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Pembahasan

Nilai yang memenihi adalah 15.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P subscript left parenthesis n comma 13 right parenthesis end subscript divided by P subscript left parenthesis n plus 1 comma 12 right parenthesis end subscript end cell equals cell 3 over 4 end cell row cell fraction numerator n factorial over denominator left parenthesis n minus 13 right parenthesis factorial end fraction divided by fraction numerator left parenthesis n plus 1 right parenthesis factorial over denominator left parenthesis n minus 11 right parenthesis factorial end fraction end cell equals cell 3 over 4 end cell row cell fraction numerator n factorial over denominator left parenthesis n minus 13 right parenthesis factorial end fraction times fraction numerator left parenthesis n minus 11 right parenthesis factorial over denominator left parenthesis n plus 1 right parenthesis factorial end fraction end cell equals cell 3 over 4 end cell row cell fraction numerator up diagonal strike n factorial end strike over denominator up diagonal strike left parenthesis n minus 13 right parenthesis factorial end strike end fraction times fraction numerator left parenthesis n minus 11 right parenthesis left parenthesis n minus 12 right parenthesis up diagonal strike left parenthesis n minus 13 right parenthesis factorial end strike over denominator left parenthesis n plus 1 right parenthesis up diagonal strike n factorial end strike end fraction end cell equals cell equals 3 over 4 end cell row cell 4 left parenthesis n squared minus 23 n plus 132 right parenthesis end cell equals cell 3 left parenthesis n plus 1 right parenthesis end cell row cell 4 n squared minus 92 n plus 528 end cell equals cell 3 n plus 3 end cell row cell 4 n squared minus 95 n plus 525 end cell equals 0 row cell left parenthesis 4 n minus 35 right parenthesis left parenthesis n minus 15 right parenthesis end cell equals 0 end table end style

begin mathsize 14px style n equals 35 over 4 space atau space n equals 15 end style
 

Nilai undefined yang memenihi adalah 15.

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