B1 is a point on the side AC of ΔABC and B1B is joined. A line is drawn through A parallel to B1B meeting BC at A1 and another line is drawn through C parallel to B1B meeting AB produced at C1. Then

\(\frac{1}{{B{B_1}}} - \frac{1}{{A{A_1}}} = \frac{2}{{C{C_1}}}\)

\(\frac{1}{{C{C_1}}} - \frac{1}{{A{A_1}}} = \frac{1}{{B{B_1}}}\)

\(\frac{1}{{C{C_1}}} + \frac{1}{{A{A_1}}} = \frac{1}{{B{B_1}}}\)

\(\frac{1}{{A{A_1}}} - \frac{1}{{C{C_1}}} = \frac{2}{{B{B_1}}}\)

B1 is a point on the side AC of ΔABC and B1B is joined. A line is dra

1.	B1 is a point on the side AC of ΔABC and B1B is joined. A line is drawn through A parallel to B1B meeting BC at A1 and another line is drawn through C parallel to B1B meeting AB produced at C1. Then
A.	\(\frac{1}{{C{C_1}}} - \frac{1}{{A{A_1}}} = \frac{1}{{B{B_1}}}\)
B.	\(\frac{1}{{C{C_1}}} + \frac{1}{{A{A_1}}} = \frac{1}{{B{B_1}}}\)
C.	\(\frac{1}{{B{B_1}}} - \frac{1}{{A{A_1}}} = \frac{2}{{C{C_1}}}\)
D.	\(\frac{1}{{A{A_1}}} - \frac{1}{{C{C_1}}} = \frac{2}{{B{B_1}}}\)
Answer» C. \(\frac{1}{{B{B_1}}} - \frac{1}{{A{A_1}}} = \frac{2}{{C{C_1}}}\)

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B1 is a point on the side AC of ΔABC and B1B is joined. A line is drawn through A parallel to B1B meeting BC at A1 and another line is drawn through C parallel to B1B meeting AB produced at C1. Then

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