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4x² + 1 = 4x
4x² - 4x + 1 = 0
(2x - 1)(2x -1) = 0
2x - 1 = 0
⇒ 2x = 1
⇒ x = 1/2
y = 4x = 4 · 1/2 = 2
jadi , titik potongnya adalah (1/2, 2)
4x² + 1 = 4x
4x² - 4x + 1= 0 --> D = 0
kedua bersinggungan ,
(2x - 1)² =0
x = 1/2 dan y = 4x = 4(1/2) = 2
tik singh (1/2, 2)
dan tidak memotong