SOAL PAS NOMOR 29
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
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