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Since the equation only has even powers of 'x', the value of f(3) and f(-3) would be the same.

Hence, answer is option E
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Bunuel
If \(f(x)=ax^4+bx^2+1\), where \(a\) and \(b\) are constants, and \(f(3)=9\), what is the value of \(f(-3)\) ?

A. -9
B. -3
C. 0
D. 3
E. 9


OA is E
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