One possible answer is Un = 3n - 1 for n = 1, 2, 3, ...
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Points: (3, 5) and (7, 11) Midpoint: (5, 8) Slope: 3/2 Perpendicular slope: -2/3 Perpendicular equation: y-8=-2/3(x-5) => 3y-24=-2x+10 => 3y=-2x+34 Therefore the perpendicular bisector equation is: 3y = -2x+34
Where parentheses can be rearranged and do no change the equation. 5*(8*2)=(8*5)*2
Points: (4, 8) and (2, -2) Slope: (8--2)/(4-2) = 5 Equation: y-8 = 5(x-4) => y = 5x-12 Equation: y--2 = 5(x-2) => y = 5x-12 So straight line equation is: y = 5x-12
1+11 2+10 3+9 4+8 5+7 6+6 7+5 8+4 9+3 2+10 11+1 That's all of them, without going into negatives
8*(5+11)/(2+6)= 8(16)/8= 16