July 3rd, 2009, 08:05 AM
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Quote:
Originally Posted by HallsofIvy  Actually, the condition given, "passes through the point A(8,1) and B(7,1) and has , for its tangent at B, the line 3x-4y-21=0", is impossible. 3(7)- 4(1)- 21= 21- 4- 21= -4, not 0 so the line 3x- 4y-21= 0 does not even pass through B.
Tesla23's solution actually gives the circle passing through A and B and tangent to 3x- 4y- 21= 0 but not] at B. | Oh my it is not possible. But why did teachers set this qn for exam?is it a mistake or they just trying to test whether we are able to solve. is it possible for them to give another line that is possible and will pass through B? |