Limits doubt
having trouble to understand the logic behind -8-2a being 0.
Also when does a limit becomes finite? is there any condition for it?
6 Replies
@Apu
Note for OP
+solved @user to close the thread when your doubt is solved. Mention the user who helped you solve the doubt. This will be added to their stats.-8-2a is zero to make the limit finite
If you want your limit to be finite..
There must be a term independent of x and all other terms must have the power of x as positive (cause if it becomes negative the limit would approach infinity which apparently isn't finite)
So all the coefficients of x,x²,... Must be zero until x⁴ and more... Cause they can be zero and other powers of x can be cancelled by the x⁴ from the denominator...
Suppose it weren't 0 then the term would be (-8-2a)x-² which would tend to infinity and non finite
ahh ok got it thats what i was looking for , thanks
+solved @Sam
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