

InterviewSolution
Saved Bookmarks
1. |
If `a , b ,c`are in harmonic progression, then the straight line `((x/a))_(y/b)+(l/c)=0`always passes through a fixed point. Find that point. |
Answer» a,b,c are in HP. Then, `(2)/(b) = (1)/(a) + (1)/(c)" "(1)` The given line is `(x)/(a) + (y)/(b) + (1)/(c) = 0" "(2)` Subtracting (1) from (2), we get `(1)/(a)(x-1) + (1)/(b)(y+2) =0` Since `a ne 0 " and " b ne 0`, we get x-1 =0 and y+2 = 20 or x =1 and y=-2 |
|