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## Homework Statement

For f(x) = sqrt(27-x), L=4, x_0 = 11 epsilon = 1, find the largest value of delta > 0 in the formal definition of a limit which ensures that |f(x) - L| < epsilon

## Homework Equations

the formal def. of a limit:

lim x->x_0 F(x) = L if, for every number epsilon > 0, there exists a corresponding number delta>0 such that

0<|x-x_0| < delta implies |f(x) - L| < epsilon

## The Attempt at a Solution

I've tried plugging multiple different things in to the equations, but i, sadly, have no idea what i'm doing.

0 < |x-11| < epsilon and |sqrt(27-x) - 4| < 1.

Attempting to solve the second equation i get x>2. If i plug that into the first equation i got -9. But that is definitely not the answer. I just don't know what all these numbers mean.