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Mathematics
23.05.2021 05:28
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Help me pleaseee and explain step by step thanks :)

Help me pleaseee and explain step by step thanks :)
Help me pleaseee and explain step by step thanks :)
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jonataespi5924
jonataespi5924
4,4(17 marks)

The~endpoints~of~MN~are~(-1,7)~and~(3,-1).\\So,~Midpoint~of~MN=(\frac{-1+3}{2} ,\frac{7-1}{2}) = (\frac{2}{2},\frac{6}{2})=(1,3)\\Now,\\MN~passes~through~(-1,7)~and~(3,-1).\\Slope~of~MN(m_{MN})=(\frac{y_2-y_1}{x_2-x_1})=\frac{-1-7}{3+1} = \frac{-8}{4} =-2\\Let~the~slope~of~the~line~which~is~perpendicular~bisector~of~MN~be~'m'.\\Using~the~condition~of~perpendicular~lines,\\(m_{MN})(m)=-1\\or, -2m=-1\\or, m=\frac{1}{2}\\The~perpendicular~bisector~of~MN~has~slope~\frac{1}{2}~and~it~passes~through~ midpoint~of~MN, (1,3).\\So,~its~equation~is~given~by:\\y-3=\frac{1}{2}(x-1)\\or, 2y-6 = x-1\\or, x-2y=1-6\\or, x-2y+5=0 ~is~the~required~equation.

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