Diketahui : f(x)=3^2x + 3^3-2x .Apabila f(a)=f(b)=20 ,maka a + b = tolong dijawab ya
Matematika
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Pertanyaan
Diketahui : f(x)=3^2x + 3^3-2x .Apabila f(a)=f(b)=20 ,maka a + b =
tolong dijawab ya
tolong dijawab ya
1 Jawaban
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1. Jawaban ayyTimmy
20 = 3^2x - 3^3-2x
*pakai kalkulator
x = [tex] \frac{ln(-( \sqrt{73} -10))}{2ln(3)} [/tex] atau x = [tex] \frac{ln(\sqrt{73} + 10)}{2ln(3)} [/tex]
maka mengunakan kalkulator
[tex] \frac{ln(-( \sqrt{73} -10))}{2ln(3)} [/tex] + [tex] \frac{ln(\sqrt{73} + 10)}{2ln(3)} [/tex] = 1.5 = 3/2
jawabannya b