Plz solve???
Asked by
| 9th Apr, 2008,
12:50: AM
Expert Answer:
line is normal to second circle so passes through its centre (-1,2)
so -a + 2b +c =0..........................(1)
touches first circle so length of tangnt from center(1,0) = radius(2)
| (a +c)/(a2 + b2 ) | = 2
eliminate c from both equation and find an equation in a & b and check from options
by solving we get 2ab = 0
so either a or b is zero so none is correct
Answered by
| 14th Dec, 2008,
12:31: AM
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