RoboguruRoboguru
SD

Jika a dan b merupakan akar-akar persamaan (1+∣x∣)log (3x+7)=2 , maka a + b = ....

Pertanyaan

Jika a dan b merupakan akar-akar persamaan begin mathsize 14px style log presuperscript open parentheses 1 plus vertical line x vertical line close parentheses end presuperscript space left parenthesis 3 x plus 7 right parenthesis equals 2 end style , maka a + b = ....

  1. -2

  2. 1

  3. 2

  4. 3

  5. 4

A. Acfreelance

Master Teacher

Jawaban terverifikasi

Pembahasan

begin mathsize 14px style Syarat space bilangan space pokok space left parenthesis basis right parenthesis colon  Syarat space 1 colon  1 plus vertical line straight x vertical line greater than 0 comma space karena space vertical line straight x vertical line space nilainya space paling space kecil space 0 comma space maka  1 plus vertical line straight x vertical line greater than 0 space berlaku space untuk space straight x element of straight R  Syarat space 2 colon  1 plus open vertical bar straight x close vertical bar not equal to 1  open vertical bar straight x close vertical bar not equal to 0  straight x not equal to 0    Mencari space penyelesaiannya colon  log presubscript straight space presuperscript left parenthesis 1 plus open vertical bar straight x close vertical bar right parenthesis end presuperscript space invisible function application open parentheses 3 straight x plus 7 close parentheses equals 2  open parentheses 3 straight x plus 7 close parentheses equals open parentheses 1 plus open vertical bar straight x close vertical bar close parentheses squared  3 straight x plus 7 equals 1 plus 2 straight x plus straight x squared  straight x squared minus straight x minus 6 equals 0  straight x subscript 1 plus straight x subscript 2 equals negative straight b over straight a equals negative open parentheses fraction numerator negative 1 over denominator 1 end fraction close parentheses equals 1 end style

78

5.0 (2 rating)

Pertanyaan serupa

Jika 16log (x−2)−16log (x2−4x+4)1​=−2, tentukan nilai x yang memenuhi persamaan tersebut.

33

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

Produk Lainnya

Hubungi Kami

Ruangguru WhatsApp

081578200000

Email info@ruangguru.com

info@ruangguru.com

Contact 02140008000

02140008000

Ikuti Kami

©2022 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia