5. The number of points on x-axis which are at 2 units from (2,4) is
(a) 1
(b) 2
(c) 0
(d) 3
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Answer:
0
Step-by-step explanation:
Distance of 'c' units from (2,3)
Let the no: of points be (x,0)
By distance formula
{(2−x)
2
+(3−0)
2
}=c
4−4x+x
2
+9=c
⇒x
2
−4x+13=c:c=2,2
There are the points of c,such that when they are applied back to the equations,the number of points will become zero .
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