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[" 9.If a variable line,"3x+4y-lambda=0"...

[" 9.If a variable line,"3x+4y-lambda=0" is such that the "],[" two circles "x^(2)+y^(2)-2x-2y+1=0" and "],[x^(2)+y^(2)-18x-2y+78=0" are on its opposite "],[" sides,then the set of all values of "lambda" is the "],[" interval ":-],[[" (1) "[12,21]," (2) "(2,17)],[" (3) "(23,31)," (4) "[13,23]]]

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If a variable line 3x+4y-lamda=0 is such that the two circles x^(2)+y^(2)-2x-2y+1=0 " and" x^(2)+y^(2)-18x-2y+78=0 are on its opposite sides, then the set of all values of lamda is the interval

If a variable line 3x+4y-lamda=0 is such that the two circles x^(2)+y^(2)-2x-2y+1=0 " and" x^(2)+y^(2)-18x-2y+78=0 are on its opposite sides, then the set of all values of lamda is the interval (a) [12,21] (b) (2, 17) (c) (23, 31) (d) [13, 23]

If a variable line 3x+4y-lamda=0 is such that the two circles x^(2)+y^(2)-2x-2y+1=0 " and" x^(2)+y^(2)-18x-2y+78=0 are on its opposite sides, then the set of all values of lamda is the interval (a) [12,21] (b) (2, 17) (c) (23, 31) (d) [13, 23]

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