JEE Main 2013 Mathematics question
If x, y, z are in A.P. and , and are also in A.P., then -
Answer: (3)
Solution
From the A.P. condition on arctangents, , meaning x,y,z are also in G.P. Combined with A.P. condition, x=y=z.
If x, y, z are in A.P. and , and are also in A.P., then -
From the A.P. condition on arctangents, , meaning x,y,z are also in G.P. Combined with A.P. condition, x=y=z.