find an equation for a line that is normal to the graph of y = xe^x and goes

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• find an equation for a line that is normal to the graph of y = xe^x and goes
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• 1,P is the point (7,5) and L1 is the line with equation 3x+4y=16(1),Find out the equation of the line L2 which passes through P and is perpendicular to L2.(2),Find the point of intersection of the L1 and L2.(3),Find the perpendicular distance of P from the line L1.------------------------------------------------可怜小妹的数学初中水平还不够,看来勘定英文是不够的!555555555555555555555555还有一个公式：gradient =y-step/x-step=1/-m给出3个点的坐标,如何证明他们形成的角是直角?（use m1m2=-1 to explain it）
• Given the domain,D={-1,0,1},which equation represents a function?A:y²=x² B:x²+y²=25 C:y=1／x D:y=﹣x²1.This problem need you to test out several points such as D for { -1,0,1}.2.Example,when you plot coordinate points of ( X,Y) such that (1,-1),(2,0),( 3,1) whichanswer choice in A,B,C or D would create something that look for like a line graph?3.When you are able to figure this out,then you found the answer.
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