Iklan

Iklan

Pertanyaan

Buktikan dengan induksi matematika pernyataan berikut untuk semua bilangan asli n . P n ​ ≡ 1 1 ​ + 2 ​ 1 ​ + 3 ​ 1 ​ + 4 ​ 1 ​ + ... + n ​ 1 ​ < 2 n ​

Buktikan dengan induksi matematika pernyataan berikut untuk semua bilangan asli .

 

Iklan

S. Solehuzain

Master Teacher

Mahasiswa/Alumni Universitas Negeri Semarang

Jawaban terverifikasi

Jawaban

terbukti bahwa .

terbukti bahwa  begin mathsize 14px style P subscript n identical to 1 over 1 plus fraction numerator 1 over denominator square root of 2 end fraction plus fraction numerator 1 over denominator square root of 3 end fraction plus fraction numerator 1 over denominator square root of 4 end fraction plus... plus fraction numerator 1 over denominator square root of n end fraction less than 2 square root of n end style.

Iklan

Pembahasan

untuk semua bilangan asli , akan dibuktikan Langkah 1, perlihatkan untuk bernilai benar. Langkah 2. Asumsu n=k benar untuk Langkah3. akan dibuktikan benar untuk n=k+1 Dengan demikian, terbukti bahwa .

untuk semua bilangan asli undefined, akan dibuktikan

begin mathsize 14px style P subscript n identical to 1 over 1 plus fraction numerator 1 over denominator square root of 2 end fraction plus fraction numerator 1 over denominator square root of 3 end fraction plus fraction numerator 1 over denominator square root of 4 end fraction plus... plus fraction numerator 1 over denominator square root of n end fraction less than 2 square root of n end style

Langkah 1, perlihatkan untuk n equals 1 bernilai benar.

n equals 1 rightwards arrow fraction numerator 1 over denominator square root of 1 end fraction less than 2 square root of 1 space text (benar) end text

Langkah 2. Asumsu n=k benar untuk 

P subscript k identical to 1 over 1 plus fraction numerator 1 over denominator square root of 2 end fraction plus fraction numerator 1 over denominator square root of 3 end fraction plus fraction numerator 1 over denominator square root of 4 end fraction plus... plus fraction numerator 1 over denominator square root of k end fraction less than 2 square root of k 

Langkah3. akan dibuktikan benar untuk n=k+1

begin mathsize 12px style P subscript k plus 1 end subscript identical to 1 over 1 plus fraction numerator 1 over denominator square root of 2 end fraction plus fraction numerator 1 over denominator square root of 3 end fraction plus fraction numerator 1 over denominator square root of 4 end fraction plus... plus fraction numerator 1 over denominator square root of k end fraction plus fraction numerator 1 over denominator square root of k plus 1 end root end fraction less than 2 square root of k plus 1 end root end style

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 square root of k plus fraction numerator 1 over denominator square root of k plus 1 end root end fraction end cell less than cell 2 square root of k plus 1 end root space left parenthesis text dikali  end text square root of k plus 1 end root right parenthesis end cell row cell 2 square root of k squared plus k end root plus 1 end cell less than cell 2 left parenthesis k plus 1 right parenthesis end cell row cell 2 square root of k squared plus k end root plus 1 end cell less than cell 2 k plus 2 space text (kedua ruas dikurang 1) end text end cell row cell 2 square root of k squared plus k end root end cell less than cell 2 k plus 1 text  (kedua ruas dikuadratkan) end text end cell row cell 4 left parenthesis k squared plus k right parenthesis end cell less than cell open parentheses 2 k plus 1 close parentheses squared end cell row cell 4 k squared plus 4 k end cell less than cell 4 k squared plus 4 k plus 1 end cell end table

Dengan demikian, terbukti bahwa  begin mathsize 14px style P subscript n identical to 1 over 1 plus fraction numerator 1 over denominator square root of 2 end fraction plus fraction numerator 1 over denominator square root of 3 end fraction plus fraction numerator 1 over denominator square root of 4 end fraction plus... plus fraction numerator 1 over denominator square root of n end fraction less than 2 square root of n end style.

Perdalam pemahamanmu bersama Master Teacher
di sesi Live Teaching, GRATIS!

1

Iklan

Iklan

Pertanyaan serupa

Buktikan masing-masing ketidaksamaan eksponen di bawah ini. a. 2 n ≥ 2 n

1

0.0

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Roboguru

Coba GRATIS Aplikasi Ruangguru

Download di Google PlayDownload di AppstoreDownload di App Gallery

Produk Ruangguru

Hubungi Kami

Ruangguru WhatsApp

+62 815-7441-0000

Email info@ruangguru.com

[email protected]

Contact 02140008000

02140008000

Ikuti Kami

©2024 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia