the straight line 7x+24y-61=0 interesct the lines X+2y+1=0 in A and B then AB is
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Answer:
Let the slope of line AC be m,
then, AB=AC
⇒∠ABC=∠BCA
∴
∣
∣
∣
∣
∣
∣
∣
∣
1−
4
m
m+
4
1
∣
∣
∣
∣
∣
∣
∣
∣
=
∣
∣
∣
∣
∣
∣
∣
∣
1−
4
1
−
4
1
−1
∣
∣
∣
∣
∣
∣
∣
∣
⇒m=
7
−23
,1.
∴ Equation of line is: 23x+7y+3=0, x−y=9.
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Answer :
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