1.

The chart below shows an expression evaluated for four different values of x. x x2+x+5 1 7 2 11 6 47 7 61 Josiah concluded that for all positive values of x, x2+x+5 produces a prime number. Which value of x serves as a counter example to prove Josiah’s conclusion false?

A. 16
B. 21
C. 5
D. 11
Answer» D. 11


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