If two positive integers $p$ and $q$ can be expressed as $p = ab^2$, and $q = a^3b; a, b$ being prime numbers, then LCM $(p, q)$ is
(A) $ab$
(B) $a^2b^2$
(C) $a^3b^2$
(D) $a^3b^3$
Given:
Two positive integers $p$ and $q$ can be expressed as $p = ab^2$, and $q = a^3b; a, b$ being prime numbers.
To find:
Here we have to find LCM $(p, q)$.
Solution:
We know that,
LCM is the product of the greatest power of each prime factor involved in the numbers.
$p = ab^2$
$= a \times b^2$
$q = a^3b$
$= a^3 \times b$
Therefore,
LCM of $p$ and $q$ is,
LCM $(ab^2, a^3b) = b^2 \times a^3$
$= a^3b^2$
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