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Russthaofficial
04.09.2020 •
Mathematics
1..
The line with gradient -2 passing through the point P(3t ,2t)intersects the x-axis at A and the y-axis at B.
i Find the area of triangle AOB in terms of t.
The line through P perpendicular to AB intersects the x-axis at C.
ii Show that the mid-point of PC lies on the line y = x
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Ответ:
Like you said, we need to use substitution to solve for y.
Now that we've solved for y, we can plug in the number we got into one of the original equations. (You can choose either equation, but I will use the first one.)
Now we have the solution of this system.