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y= 3x .....y' = 3
y=x^3 + k ....y'=3x^2
3x^2 = 3
x^2 = 3/3 =1
x = ⁺₋V1 =⁺₋ 1
maka x1 = 1 , x2 = -1
y = 3x = 3(1) = 3 ....... y= 3x = 3(-1) = -3
y = x^3 + k = 3 ....... y = x^3 + k = -3
1^3 + k = 3 ..... (-1)^3 + k = -3
1+k =3 ...... -1 + k = -3
k = 3-1 = 2 ...... k = -3 + 1 = -2
jadi kemungkinan nilai k ada dua macam , k1 = 2 dan k2 = -2
y= 3x .....y' = 3
y=x^3 + k ....y'=3x^2
3x^2 = 3
x^2 = 3/3 =1
x = ⁺₋V1 =⁺₋ 1
maka x1 = 1 , x2 = -1
y = 3x = 3(1) = 3 ....... y= 3x = 3(-1) = -3
y = x^3 + k = 3 ....... y = x^3 + k = -3
1^3 + k = 3 ..... (-1)^3 + k = -3
1+k =3 ...... -1 + k = -3
k = 3-1 = 2 ...... k = -3 + 1 = -2