Prove the following

Question:

On increasing $\mathrm{a}$, b increases in such a manner that $\frac{a}{b}$ remains--and positive, then $\mathrm{a}$ and $\mathrm{b}$

are said to vary directly with each other.

Solution:

On increasing $a$, $b$ increases in such a manner that $\frac{a}{b}$ remains constant and positive, then $a$ and $b$ are said to vary directly with

each other.

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