Inequalities & Absolute Value
ACT · Flashcards · Recall
ACT · FLASHCARDS
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QUESTION
What does the inequality symbol
≤
\leq
≤
mean?
QUESTION
What happens to an inequality when you add the same number to both sides?
QUESTION
What is the definition of absolute value
∣
a
∣
|a|
∣
a
∣
for real
a
a
a
?
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ANSWER
∣
a
∣
=
a
if
a
≥
0
;
∣
a
∣
=
−
a
if
a
<
0
|a|=a\text{ if }a\ge 0;\ |a|=-a\text{ if }a<0
∣
a
∣
=
a
if
a
≥
0
;
∣
a
∣
=
−
a
if
a
<
0
. Distance from zero; always non-negative.
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