1 1/x has oscillation â at x = 0, and oscillation 0 at other finite x and at ââ and 2  +â. sin (1/x) (the topologist's sine curve) has oscillation 2 at x = 0, and 0 elsewhere. 3  sin x has oscillation 0 at every finite x, and 2 at ââ and  +â. The sequence 1, â1, 1, â1, 1, â1, ... has oscillation 2.
An herbicide is a chemical used to kill or inhibit the growth of weeds and other unwanted plant pests. There are two kinds of herbicides. Species-specific herbicides are designed to kill a specific kind of plant only, leaving other desirable plants unharmed.hen should you use an herbicide? An herbicide is appropriate any time that you have pest plants or weeds that are competing with desired plants or crops for space, water, light, and nutrients. They are often used in lawn and garden care to achieve a desired aesthetic effect.
Really a herbicide is a kind of pesticide. Cide means to kill, so a pesticide is just anything that's meant to kill a pest. So all of these are pesticides. So insecticides are meant to kill insects, fungicides are meant to kill fungi, herbicides are meant to kill plants.