Answer:
21, 24, 27, 30, 33, 36, 39.
Step-by-step explanation:
multiples of 3 : 21, 24, 27, 30, 33, 36, 39.
multiples of 2 : 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40
A.
B.
It's a minimum, becuase .
C.
The axis of symmetry is . So, in this case, it's .
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