lim x infnitive (4x-1/2x+9)
2 answers
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
When you post a mathematical expression containing a fraction, you have to delimit the numerator and denominator using parentheses, otherwise the expression will be interpreted incorrectly most of the time.
For example, according to the usual rules of priority of operations, the posted expression evaluates to:
4x-(1/2)*x+9 = 7x/2+9
which is probably not quite what you want.
If the expression is meant to be:
(4x-1)/(2x+9), you can evaluate the limit by dividing both the numerator and denominator by x to get
(4-1/x)/(2+9/x)
and evaluate the expression when x->∞.
For example, according to the usual rules of priority of operations, the posted expression evaluates to:
4x-(1/2)*x+9 = 7x/2+9
which is probably not quite what you want.
If the expression is meant to be:
(4x-1)/(2x+9), you can evaluate the limit by dividing both the numerator and denominator by x to get
(4-1/x)/(2+9/x)
and evaluate the expression when x->∞.