Saved Bookmarks
| 1. |
If `f(3x+2)+f(3x+29)=AAx in R ,`then the period of `f(x)`is7 (b) 8(c) 10 (d) none of theseA. 7B. 8C. 10D. none of these |
|
Answer» Correct Answer - D `f(3x+2)+f(3x+29)=0 " (1)" ` Replacing x by `x+9`, we get `f(3(x+9)+2)+f(3(x+9)+29)=0` ` or f(3x+29)+f(3x+56)=0 " (2)" ` From (1) and (2), we get `f(3x+2)=f(3x+56)` ` or f(3x+2)=f(3(x+18)+2)` Therefore, f(x) is periodic with period 54. |
|