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Tulislah dalam bentuk penjumlahan dari k = 1 ∑ 7 ​ ( 5 k − 4 )

Tulislah dalam bentuk penjumlahan dari 

 

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H. Firmansyah

Master Teacher

Mahasiswa/Alumni Universitas Gadjah Mada

Jawaban terverifikasi

Jawaban

diperoleh hasilnya .

diperoleh hasilnya sum from k equals 1 to 7 of left parenthesis 5 k minus 4 right parenthesis equals table attributes columnalign right center left columnspacing 0px end attributes row blank blank 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 11 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 16 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 21 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 26 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 31 end table.

Pembahasan

Ingat notasi sigma Diperoleh perhitungan Dengan demikian, diperoleh hasilnya .

Ingat notasi sigma

sum from k equals 1 to n of U subscript n equals U subscript 1 plus U subscript 2 plus... plus U subscript n 

Diperoleh perhitungan

table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell sum from k equals 1 to 7 of left parenthesis 5 k minus 4 right parenthesis end cell row blank equals cell open parentheses 5 left parenthesis 1 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 2 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 3 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 4 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 5 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 6 right parenthesis minus 4 close parentheses plus open parentheses 5 left parenthesis 7 right parenthesis minus 4 close parentheses end cell row blank equals cell left parenthesis 5 minus 4 right parenthesis plus left parenthesis 10 minus 4 right parenthesis plus left parenthesis 15 minus 4 right parenthesis plus left parenthesis 20 minus 4 right parenthesis plus left parenthesis 25 minus 4 right parenthesis plus left parenthesis 30 minus 4 right parenthesis plus left parenthesis 35 minus 4 right parenthesis end cell row blank equals cell 1 plus 6 plus 11 plus 16 plus 21 plus 26 plus 31 end cell end table 

Dengan demikian, diperoleh hasilnya sum from k equals 1 to 7 of left parenthesis 5 k minus 4 right parenthesis equals table attributes columnalign right center left columnspacing 0px end attributes row blank blank 1 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 11 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 16 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 21 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 26 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 31 end table.

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