Simultaneous Linear Equations with More Than Two Variables (VCE SSCE Mathematical Methods): Flashcards

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Simultaneous Linear Equations with More Than Two Variables
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Geometric representation of ax+by+cz=dax + by + cz = d

A plane in three-dimensional space

Main strategy for elimination with 3 variables

Reduce to a two-variable system, then solve

What we find solving 3 equations in xx, yy, zz

Values satisfying all three equations simultaneously

Geometric meaning: unique solution in 3D system

Three planes intersect at exactly one point

Geometric meaning: infinitely many solutions in 3D

Three planes intersect along a common line

Geometric meaning: no solution in 3D system

Planes parallel or have no common intersection

How to visualise a plane in 3D

Find where it intersects each axis

Role of parameter λ\lambda in parametric solutions

Each value gives a different point on the line of solutions

Three perpendicular axes in 3D coordinate geometry

xx, yy, and zz

What parametric form describes for infinite solutions

All points on a straight line in 3D space

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