Roboguru

Lingkaran yang berpusat di  dengan , menyinggung g...

Lingkaran yang berpusat di begin mathsize 14px style left parenthesis a comma space b right parenthesis end style dengan begin mathsize 14px style a comma space b greater than 3 end style, menyinggung garis begin mathsize 14px style 3 x plus 4 y equals 12 end style. Jika lingkaran tersebut berjari-jari 12, maka begin mathsize 14px style 3 a plus 4 b equals.... end style 

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row r equals cell open vertical bar fraction numerator a x subscript 1 plus b y subscript 1 plus c over denominator square root of a squared plus b squared end root end fraction close vertical bar end cell row 12 equals cell open vertical bar fraction numerator 3 a plus 4 b plus negative 12 over denominator square root of 3 squared plus 4 squared end root end fraction close vertical bar end cell row 12 equals cell open vertical bar fraction numerator 3 a plus 4 b plus negative 12 over denominator square root of 25 end fraction close vertical bar end cell row 12 equals cell open vertical bar fraction numerator 3 a plus 4 b plus negative 12 over denominator 5 end fraction close vertical bar end cell row cell 5 cross times 12 end cell equals cell 3 a plus 4 b minus 12 space space end cell row 60 equals cell 3 a plus 4 b minus 12 space space end cell row cell 3 a plus 4 b end cell equals cell 60 plus 12 space space end cell row cell 3 a plus 4 b end cell equals 72 end table end style

0

Ruangguru

RUANGGURU HQ

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

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved