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I am total beginner, and I read all questions and response on this site, but still can not figure it out. I tried align* and flalign, but always is some error. Hope you can help.

\documentclass[10pt]{article}
\usepackage[top=1in, bottom=1in]{geometry}
\usepackage{amsfonts}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage[T1]{fontenc}

.........



\textbf{2.}Use the properties of logarithms:  
$$\log_2(x^4\sqrt{\frac{x}{z^3}})$$ $$\ln(\frac{7x^3\sqrt{x+1}}{5})$$
$$\log_8(x-1)=\log_8(x-2)-\log_8(x+2)$$
$$5\ln(x-2)-\ln(x+2)-3\ln(x)$$
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  • Do you want all equations to begin at the left margin?
    – Bernard
    Mar 22, 2019 at 16:37
  • yes, left margin
    – MaYa
    Mar 23, 2019 at 2:15
  • please read a proper introduction to LaTeX. You will have more worries later if you continue the way you are going now.
    – Johannes_B
    Mar 23, 2019 at 6:18
  • Sure. Thanks again!
    – MaYa
    Mar 23, 2019 at 6:19

1 Answer 1

2

Like this?

\documentclass[10pt,fleqn]{article}
\usepackage[top=1in, bottom=1in]{geometry}

\begin{document}
Something
\[\log_2\left(x^4\sqrt{\frac{x}{z^3}}\right)\]
\[\ln\left(\frac{7x^3\sqrt{x+1}}{5}\right)\]
\[\log_8(x-1)=\log_8(x-2)-\log_8(x+2)\]
\[5\ln(x-2)-\ln(x+2)-3\ln(x)\]
\end{document}

% Option `fleqn' align all display-style equations
% to the left margin, but you have to use LaTeX
% command \[ \] instead of plain TeX command $$ $$

enter image description here

or this?

\documentclass[10pt]{article}
\usepackage[top=1in, bottom=1in]{geometry}
\usepackage{amsmath}

\begin{document}
Something

\begin{align*}
    &\log_2\left(x^4\sqrt{\frac{x}{z^3}}\right)\\
    &\ln\left(\frac{7x^3\sqrt{x+1}}{5}\right)\\
    &\log_8(x-1)=\log_8(x-2)-\log_8(x+2)\\
    &5\ln(x-2)-\ln(x+2)-3\ln(x)
\end{align*}
\end{document}

% The `align' environment (provided by `amsmath')
% can align all lines in the equation but still 
% make the equation centered. You have to add a &
% to make the lines left-aligned. Read more in
% LaTeX introductory documents.
%
% `align*' is `align' but the lines are not numbered

enter image description here

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