Q.
If a, c, b are in G.P , then the area of the triangle formed by the lines ax+by+c=0 with the coordinates axes is equal to
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a
1
b
2
c
12
d
3
answer is C.
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Detailed Solution
ax-c+by-c=1x-ca+y-cb=1Area of the triangle =12 (x intercept) × (y intercept)=12(−ca)(−cb)=12c2ab=12[∵ a, c, b are in G.P ⇒c2=ab ]
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