The graphs of which functions approach positive infinity as x approaches both negative infinity and positive infinity? Select
all that apply.
Select all that apply:
Of(x)= x² + 5x + 9
Of(x) = 4x³ + 5x²
Of(x) = 19x+ + 8x³+1
Of(x) = -9x³+4x²+3x²+8
Of(x) = 18x³ + 8x³ +6
Of(x) = 3x6 + 7x4 + 9x