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Step-by-step explanation:
11) 3k-1 , k+3 , k - 1 ---- AP
d = k+3 - (3k-1) = k-1 -(k+1)
= k+3-3k+1 = k-1-k-1
= 4-2k = -2
= -2k = -6
= k = +3...
12) A(3,-4) B(-6,8)
mid pt. = x1 + x2/2 , y1 +y2/2
= 3+(-6)/2 , (-4)+8/2
= -3/2 , 4/2
= (-3/2,2)
so, it is in second quadrant ..
13) is not ..
PLZ MARK THIS AS BRANIEST !!
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