SOLUTION: f={(1,2)(2,-3)(3,-1)},then 2f=?

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Question 718071: f={(1,2)(2,-3)(3,-1)},then 2f=?
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
f={(1,2)(2,-3)(3,-1)},then 2f=?
Answer: 2f = {(1,4)(2,-6)(3,-2)}
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