Question: Consider the expression y = x2 2kx + k2 + 1. For which of the following values of k, y will be always greater

Consider the expression y = x2 – 2kx + k2 + 1.

For which of the following values of k, y will be always greater than zero for any value of x?

(a) k > 0

(b) k is any real number

(c) k > 2

(d) –2 < k < 7

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