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m1 = 4x - 2/x³
y = 2x + 7
m2 = 2
m1 = m2
4x - 2/x³ = 2
4x^4 - 2x² - 2 = 0
2x^4 - x² - 1 = 0
(2x² + 1)(x² - 1) = 0
2x²= -1 atau x² = 1
x² = -1/2 x = 1 atau x = -1
x = imajiner y = 9 y = 5
persamaan grs melalui titik (1,9) dan m = 2
y - y1 = m(x-x1)
y - 9 = 2(x-1) ⇒ y = 2x - 2 + 9 ⇒ y = 2x + 7
persamaan grs melalui titik (-1,5) dan m = 2
y - y1 = m(x-x1)
y - 5 = 2(x+1) ⇒ y = 2x + 2 + 5 ⇒ y = 2x + 7 sama juga