Calculus › Limits of functions

Differences of square roots

Solve the first problem 16 problems

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  1. Limit of a sum with a cube root ●○○○○ 10 ptsCompute lim⁡x→10(4x+x−23)\lim_{x \to 10} \left(4x + \sqrt[3]{x - 2}\right).
  2. Limit of a square-root difference ●●○○○ 20 ptsFind lim⁡n→∞n(n+1−n)\lim_{n\to\infty} \sqrt{n}\left(\sqrt{n+1}-\sqrt{n}\right). Give your answer as a decimal.
  3. Limit of nested square roots ●●○○○ 20 ptsFind lim⁡x→∞(x+x+x−x)\lim_{x\to\infty}\left(\sqrt{x+\sqrt{x+\sqrt{x}}}-\sqrt{x}\right).
  4. Limit of quotient of root differences ●●○○○ 20 ptsFind lim⁡x→0(1+x)1/2−1(1+x)1/3−1\lim_{x \to 0} \frac{(1+x)^{1/2} -1}{(1+x)^{1/3} -1} without using L'Hôpital's rule. Round to three decimal places.
  5. Parameters of a square-root limit ●●●○○ 50 ptsFind the values of the constants aa and bb such that lim⁡x→1a−x−b+xx−1=−12\lim_{x \to 1} \frac{\sqrt{a-x} - \sqrt{b+x}}{x-1} = -\frac{1}{2}.
  6. Limit of a ratio with roots ●●●○○ 50 ptsFind lim⁡x→22−2+x213−(4−x)13\lim_{x\rightarrow 2}\frac{2-\sqrt{2+x}}{2^{\frac{1}{3}}-(4-x)^{\frac{1}{3}}} without using L'Hospital's rule. Round your answer to two decimal places.
  7. Limit at root 6 with radicals ●●●○○ 50 ptsFind lim⁡x→65+2x−(3+2)x2−6\lim_{x\to\sqrt{6}}\frac{\sqrt{5+2x}-(\sqrt{3}+\sqrt{2})}{x^2-6}. Round to two decimal places.

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