posted by yengiang .
Please help with this problem. Thanks
a/ Show that for any real number x,
if x>1 then |x^4|=< |23x^4 + 8x^2 + 4x|
b/ Show that for any real number x,
if x>1 then |23x^4 + 8x^2 + 4x| => |x^4|
c/ Use the big Theta and big O-notations to express the results of part (a) and (b)
d/ What can you deduce about the order of 23x^4 + 8x^2 + 4x ?