3. Calculate the value of each limit. If the limit is not obvious, show the algebra process you used to calculate the limit: ( Please do not use L'Hospital's Rule, since we have not studied it yet )...

Please, provide all the steps!

Extracted text: 3. Calculate the value of each limit. If the limit is not obvious, show the algebra process you used to calculate the limit: ( Please do not use L'Hospital's Rule, since we have not studied it yet ) (possible answers include a number, o, or -0, or “D.N.E." = "does not exist") 10-2021 7x2 + 12x т — (a) lim (b) lim x2 9 – x2 (c) lim (12"] – 2=) x→3- ( Notice this is a left-sided limit. [2°] = the greatest integer funtion of 2", and 21=) = 2 raised to the power of the greatest integer function of x. Recall that |x| = the greatest integer which is less than or equal to x. For example |4.9| = 4, |4| = 4, [0.7| = 0, and [-1.7] = -2) f(h) + f(-h) – 2f (0) (d) lim for the function f(x) = h→0 h2 3 — х