waecmaths question:
If x varies inversely as y and y varies directly as z, what is the relationship between x and z
Option A:
$x\propto z$
Option B:
$x\propto \tfrac{1}{z}$
Option C:
$x\propto {{z}^{2}}$
Option D:
$x\propto \tfrac{1}{{{z}^{2}}}$
waecmaths solution:
$x\propto z$ Option A
maths year:
maths topics: