Question 11 MarkIf $a: b:: b: c$, then $b$ is called the mean proportion between $a$ and $c$. __________AnswertrueView full question & answer→
Question 21 MarkThree numbers $a, b, c$ are in continued proportion if $\frac{a}{b}=\frac{c}{b}$. __________AnswerfalseView full question & answer→
Question 31 Mark$\frac{1}{x}: \frac{1}{y}$ is the same as $y: x$. __________AnswertrueView full question & answer→
Question 41 Mark$a: b:: c: d \Leftrightarrow a c=d b$ __________AnswerfalseView full question & answer→