1is the ans: a=-0.5 b=9 am i rite???
If the orthocentre of ΔABC formed by the intersection of lines 2x + 3y - 1 = 0, x + 2y - 1 = 0 & ax + by - 1 = 0 is origin, find a, b.
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8 Answers
1i ve redone the prob (took 4 mins)...i ve got the ans ...probably there was some calc mistke
1easy procedure isthere
first finding the intersection point of two lines given
then find the line equation of line passing thru that point and origin
now take product of slope of this line obtained and ax+by-1 =0 as -1
am i right mentor ?
we will get a=-b using this
1then we can find the oint of intersection of ax-ay-1=0 and any one of the lines
say it be (a,b)
slope is b/a
now
b/a *(slope of another line )= -1
hence we can find a !