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Verified answer
No 31 - (x - 1)¹/² -1/2(x - 1)⁻¹/²
lim ------------------ = lim ------------------
×→₂ x² - 2x ˣ→² 2x - 2
- 1/2 (2 - 1)⁻¹/²
= ------------------------
2(2) - 2
- 1/2
= --------------
2
= - 1/2 x 1/2
= - 1/4
no 4
3 - (2x + 3)¹/² - 1/2. 2(2x + 3)⁻¹/²
lim -------------------- = lim ---------------------------
ₓ→₃ x² - 9 ₓ→₃ 2x
- 1 (2(3) + 3)⁻¹/²
= ----------------------------
2(3)
9⁻¹/²
= ------------
6
(3²)⁻¹/²
= -------------
6
= 1/3 x 1/6
= 1/18