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gizmo_the_mogwai [7]
3 years ago
7

choose the equation below that represents the line passing through the point (2,-4) with a slope of 1/2

Mathematics
1 answer:
klasskru [66]3 years ago
8 0
In order to find this, you use the y=mx+b formula. Your are given the slope so you know that you can say y=1/2x+b. Now you plug in the point (2,-4). The problem would be -4=1/2(2)+b. When you solve it, you get -5=b. Therefore, the equation is: y=1/2x-5
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Check the forward differences of the sequence.

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a_{n+1} = (a_{n-2} + 2(n-1)) + 2((n+1)+n) \\ ~~~~~~~ = a_{n-2} + 2 ((n+1) + n + (n-1))

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a_{n+1} = a_1 + 2 \displaystyle \sum_{k=2}^{n+1} k = 2 + 2 \times \frac{n(n+3)}2

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