tolong bantu 5^x + 5^1-x =6 ... tolong bantu cpat kawan...
Matematika
rahmad190
Pertanyaan
tolong bantu 5^x + 5^1-x =6 ... tolong bantu cpat kawan...
1 Jawaban
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1. Jawaban Anonyme
jawab
5ˣ + 5¹⁻ˣ = 6
5ˣ + 5. 1/5ˣ = 6...} kali 5ˣ
(5ˣ)² + 5 = 6.(5ˣ)
(5ˣ)² - 6 (5ˣ) + 5 = 0
misalkan
a= 5ˣ → x= ⁵log a
a² - 6a +5 =0
(a -5)(a -1) = 0
a = 5 atau a = 1
x = ⁵log a
untuk a = 5 → x = ⁵log 5 = 1
untuk a= 1 → x = ⁵log 1 = 0
HP (x) = ( 0, 1)