BLOG BY NOUFAL RAYHAN R

  29). Jika  x log2 - y log3 + z log5 = 10 maka 2x +  8y - 3z =... PEMBAHASAN :        x(log2) - y(log3) + z(log5) = 10        log2ˣ + log5^z= log10¹⁰ +  log3^y        log 2ˣ .5^z = log10¹⁰. 3^y        2ˣ . 5^z =  10¹⁰. 3^y        2ˣ . 5^z . 3^0=  2^10. 5^10. 3^y x = 10 y = 0 z = 10 maka : 2x + 8y - 3z = 2(10) + 8(0) - 3(10)                    = 20 + 0 - 30                    = -10                      

  𝓟𝓮𝓶𝓫𝓪 𝓱𝓪𝓼𝓪𝓷 𝓼𝓸𝓪𝓵 𝓹𝓪𝓼 𝙈𝙖𝙩𝙚𝙧𝙞 : 𝙀𝙠𝙨𝙥𝙤𝙣𝙚𝙣 Soal nomor 1-3 1). f (x) = k . 25x - 8 f (x) = k . 25 (2) - 8 20 = 50 k - 8 28 = 50k k = 28/50 -3k = -3 . 28/50 = -84/50 2). y - 3/2-3 = x - 1/ 0-1 y - 3 / -1 = x - 1 / -1 -1 (y-3) = -1 (x-1) -y + 3 = -x + 1 -y = -x - 2 y = x + 2 3). √8x²-4x+3 = 1/32^x-1      8 x²-4x+3/2 = 32^-x-1      3x²-12x+9/2 = -5x + 5       3x²-12x+19 = -10x + 10      3x² - 2x + 9 = 0      (3x -3/3) (3x + 1) = 0      (x-1) (3x+1) = 0      x = 1 atau x = -1/3 p+6q 1+6 (-1/3) 1 - 2 = -1