Extraneous Solutions - Precalculus | Socratic
In general, extraneous solutions arise when we perform non-invertible operations on both sides of an equation. (That is, they sometimes arise, but not always.) Non-invertible operations include: raising to an even power (odd powers are invertible), multiplying by zero, and combining sums and differences of logarithms.. Example: The equations: #x+2=9# and #x=7#, have exactly the same set of ...
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