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OpenStudy (anonymous):
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OpenStudy (alekos):
For Q11 \[k \neq -5\] because the original equation is undefined for that value For Q12 4th line numerator should be 2x - 9 - x + 1
OpenStudy (alekos):
If you make k= -5 you'll have 0 in the denominator in the first line hence undefined
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