If ° represents one of the operations +, -, and x, is k °(l + m) = (k ° 1) + (k ° m) for all numbers k, l, and m?
(A) k ° 1 is not equal to 1 ° k for some numbers k.
(B) ° represents subtraction.
Ans: D
symbol
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(2) Simply replace ° with -.
(1) Notice that the condition is not satisfied by + and by x, therefore it must be - as in case (1).
k - l - m = 2k - l - m
now this would be true for k = 0, but the question says that it must hold for all k, thus we can say with certainty NO. Ans. D
(1) Notice that the condition is not satisfied by + and by x, therefore it must be - as in case (1).
k - l - m = 2k - l - m
now this would be true for k = 0, but the question says that it must hold for all k, thus we can say with certainty NO. Ans. D
But in each case, we are getting different answers like No for (1) and Yes for (2)?
alescau wrote:(2) Simply replace ° with -.
(1) Notice that the condition is not satisfied by + and by x, therefore it must be - as in case (1).
k - l - m = 2k - l - m
now this would be true for k = 0, but the question says that it must hold for all k, thus we can say with certainty NO. Ans. D
Philosophers have interpreted world in various ways, the point is to change it!