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Math·Advanced Math·Nonlinear functions
hardThe function f is defined by f(x)=9x2+kx−17, where k is a constant. In the xy-plane, the graph of y=f(x) passes through the points (r,27) and (2r,143), where r is a constant. Which of the following could be the value of k?
A
4
B
8
C
116
D
170