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

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.