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so i guess it is computer marked
yeah its for my hw on aops
If a student hands in work on a sheet of paper I can view all the working and award marks for good maths. Some on-line courses only want answers that can be checked by a computer. So it is necessary to submit single letters (if multi-choice) or numbers so that the program can do an exact comparison. It's easy for the course administrators but somewhat poor at detecting student misunderstandings.
what do you mean by computer marked?
I suppose that is correct. Bit strange though. If you got the first k wrong, but knew to make it minus, you'd still get 0. Wrong working but right answer. Hhhmmm. Worrying. If I was testing a student, I'd ask for both answers, just to be certain. Is this work computer marked by any chance?
i got 0 since 3/2+-3/2 is 0
what do you mean by just say minus the same for the second one
That looks good to me. Just say minus the same for the second one.
i got one value for k (3/2) but i don't know how to get the other one
When all lengths are increased by a scale factor k, each side of the square is k times bigger so the area gets bigger by a factor of k squared.
When a square of area 4 is dilated by a scale factor of k, we obtain a square of area 9. Find the sum of all possible values of k.