Which statement best describes how to determine whether f(x) = x3 + 5x + 1 is an even function?
a.Determine whether –(x3 + 5x + 1) is equivalent to x3 + 5x + 1.
b.Determine whether (–x)3 + 5(–x) + 1 is equivalent to x3 + 5x + 1.
CDetermine whether –x3 + 5x + 1 is equivalent to –(x3 + 5x + 1).
DDetermine whether (–x)3 + 5(–x) + 1 is equivalent to –(x3 + 5x + 1).
a.Determine whether –(x3 + 5x + 1) is equivalent to x3 + 5x + 1.
b.Determine whether (–x)3 + 5(–x) + 1 is equivalent to x3 + 5x + 1.
CDetermine whether –x3 + 5x + 1 is equivalent to –(x3 + 5x + 1).
DDetermine whether (–x)3 + 5(–x) + 1 is equivalent to –(x3 + 5x + 1).