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Caranya tertera pada gambar. Silahkan diperiksa kembali, mohon maaf jika nantinya terdapat kesalahan.
f'(x)= 3x^2-3
3x^2-3=0
3x^2=3
x^2=1
x=1 x=-1
x=1, y= 1^3 -3(1)+3= -1
x= -1, y= (-1)^3 -3(-1)+3= 5