Explanation:
let see:
f(x) = -ax(x-3)³(x+5)⁴
according to the graph we have
the coordinate (1, y) => y is possitive.
for x = 1 , the function :
f(1) = -a(1) (1-3)³(1+5)⁴
= -a (-8)(6)⁴
= 8a(6)⁴ will be possitive
therefore, the correct answer is A.
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