c.
x⁴ - x² < 0
Berarti :
x²(x² -1) < 0
Pembuat nol :
x² = 0
x = 0
x² -1 = 0
x = -1 atau x = 1
Krena < 0, jadi hp nya
-1 < x < 1
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c.
x⁴ - x² < 0
Berarti :
x²(x² -1) < 0
Pembuat nol :
x² = 0
x = 0
x² -1 = 0
x = -1 atau x = 1
Krena < 0, jadi hp nya
-1 < x < 1