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plug in really really big positive number for x and see what happen
plug in really really big neagive number for x and see what happen
what do u mean
just plug in a number which tends to positive and negative infinity to see what the function behaves as at the end points... for eg. if u plug a really big positive number as imran says u will see that the fubction tends to +∞
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ok and then what
similarly if u see it at -∞ it again tends to -∞ , so you can describe the function at the end as ut tends to positive as x tends infinity and negative infinity when x tends to negative infinity.. It was simpler in this case, sometimes becomes difficult when function is confusing |dw:1327631652491:dw| is how ur graph looks