Eric Nicholas K's answer to Dylan Lim's Junior College 1 H2 Maths Singapore question.
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Good evening Annie! Here are my workings for part c.
Although the denominator term “c” is an unknown number which can be positive or negative, converting from -c to c is essentially a multiplication or division by -1 regardless of the value of c, and thus my working steps can be treated as multiplication or division by a negative number without any change to the number c itself, and hence the inequality signs can be changed safely.
Although the denominator term “c” is an unknown number which can be positive or negative, converting from -c to c is essentially a multiplication or division by -1 regardless of the value of c, and thus my working steps can be treated as multiplication or division by a negative number without any change to the number c itself, and hence the inequality signs can be changed safely.
Date Posted:
4 years ago
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