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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 | |