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Number of integral values lambda for whi...

Number of integral values `lambda` for which the varaible line `3x+4y-lambda = 0` lies between the circles `x^2 + y^2 - 2x - 2y + 1 = 0` and `x^2 + y^2 - 18x - 2y + 78 = 0`, without intersecting any circle at two distinct points.

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