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A map uses kx + 1 up to 5 and 3x - 5 after; continuity at 5 forces k = ?
A9/5
B5/9
C2/5
D2
Answer & Solution
Correct answer: A. 9/5
The right value is 3(5) - 5 = 10, so 5k + 1 = 10 and k = 9/5.
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