Persamaan Eksponen
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2²ˣ⁺¹ - 14 . 2ˣ + 12 =0
2²ˣ . 2¹ - 14 2ˣ + 12 =0
2 (2ˣ)² - 14 (2ˣ) + 12= 0
misal 2ˣ = p --> x= ²log p dengan p > 0
2 p² -14 p + 12=0
p² - 7p + 6 =0
(p - 6)(p - 1) = 0
p= 6 atau p= 1
2ˣ = p
i) 2ˣ = 6 --> x = ²log 6 =²log 2 + ²log 3
x = 1 + ²log 3
ii) 2ˣ = 1 --> x = ²log 1 = ²log 2⁰
x = 0
HP x= 0 atau x = 1 + ²log 3
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Persamaan Eksponen
*
2²ˣ⁺¹ - 14 . 2ˣ + 12 =0
2²ˣ . 2¹ - 14 2ˣ + 12 =0
2 (2ˣ)² - 14 (2ˣ) + 12= 0
misal 2ˣ = p --> x= ²log p dengan p > 0
2 p² -14 p + 12=0
p² - 7p + 6 =0
(p - 6)(p - 1) = 0
p= 6 atau p= 1
*
2ˣ = p
i) 2ˣ = 6 --> x = ²log 6 =²log 2 + ²log 3
x = 1 + ²log 3
ii) 2ˣ = 1 --> x = ²log 1 = ²log 2⁰
x = 0
*
HP x= 0 atau x = 1 + ²log 3