- Started with
\[\frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x + 1}}\]
12.3
- Using strategy
rm 12.3
- Applied flip-- to get
\[\color{red}{\frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x + 1}}} \leadsto \color{blue}{\frac{{\left(\frac{1}{\sqrt{x}}\right)}^2 - {\left(\frac{1}{\sqrt{x + 1}}\right)}^2}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}}\]
12.3
- Applied simplify to get
\[\frac{\color{red}{{\left(\frac{1}{\sqrt{x}}\right)}^2 - {\left(\frac{1}{\sqrt{x + 1}}\right)}^2}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\color{blue}{\frac{1}{x} - \frac{1}{1 + x}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}\]
12.3
- Applied taylor to get
\[\frac{\frac{1}{x} - \frac{1}{1 + x}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}\]
9.5
- Taylor expanded around inf to get
\[\frac{\color{red}{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\color{blue}{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}\]
9.5
- Applied taylor to get
\[\frac{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}\]
9.5
- Taylor expanded around 0 to get
\[\frac{\color{red}{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\color{blue}{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}}\]
9.5
- Applied simplify to get
\[\frac{\left(\frac{1}{{x}^2} + \frac{1}{{x}^{4}}\right) - \frac{1}{{x}^{3}}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{x + 1}}} \leadsto \frac{\left(\frac{1}{{x}^{4}} + \frac{\frac{1}{x}}{x}\right) - \frac{1}{{x}^3}}{\frac{1}{\sqrt{x}} + \frac{1}{\sqrt{1 + x}}}\]
7.0
- Applied final simplification