Possible Values of the Inequality.

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    Inequality
In summary, the possible values of |2x-3| when 0<|x-1|<2 are -5<|2x-3|<3. These values are obtained by considering two cases, where 0<x-1<2 and 0<-x+1<2, and determining the range of possible values for 2x-3 in each case. It is important to note that the inequality -5<|2x-3|<-1 does not have any solutions, as the absolute value is always greater than or equal to 0. Therefore, the correct solution is |2x-3|<3.
  • #1
NATURE.M
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Homework Statement



What are the possible values of |2x−3| when 0<|x−1|<2?

Homework Equations





The Attempt at a Solution



We know [itex]\left|x-1\right|[/itex] becomes x-1 if x-1≥0 and -(x-1) if x-1<0.
Now consider two cases.
Case 1:
0<x-1<2 [itex]\Rightarrow[/itex] 1<x<3 [itex]\Rightarrow[/itex] -1<2x-3<3.

Case 2:
0<-x+1<2 [itex]\Rightarrow[/itex] -1<x<1 [itex]\Rightarrow[/itex] -2<2x<2 [itex]\Rightarrow[/itex] -5<2x-3<-1.

Then the possible value include -1<|2x-3|<3 and -5<|2x-3|<-1.

Am I going about this problem correctly?
 
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  • #2
NATURE.M said:
Then the possible value include -1<|2x-3|<3 and -5<|2x-3|<-1.

Saying -5< |2x-3| is not a particularly bold statement to make... take another look at the inequalities you got before you took the absolute value and think a bit harder about what they tell you about the absolute value.
 
  • #3
Office_Shredder said:
Saying -5< |2x-3| is not a particularly bold statement to make... take another look at the inequalities you got before you took the absolute value and think a bit harder about what they tell you about the absolute value.

Then the possible solutions should probably just be |2x-3|<3, since no solution exists to the inequality -5<|2x-3|<-1 since |2x-3| is bounded by negative values.
Am I right?
 

1. What is an inequality?

An inequality is a mathematical expression that compares two quantities and shows that they are not equal. The symbols used in inequalities are <, >, ≤, and ≥.

2. What are the possible values of an inequality?

The possible values of an inequality depend on the given variables and the relationships between them. Inequalities can have an infinite number of possible values, as they cover a range of values rather than a single value.

3. How do you solve an inequality?

To solve an inequality, you must isolate the variable on one side of the inequality symbol and simplify the expression on the other side. The solution will be in the form of a range of values that satisfy the inequality.

4. What is the difference between an equality and an inequality?

An equality shows that two quantities are exactly equal, while an inequality shows that two quantities are not equal. Inequalities represent a range of values, while equalities represent a specific value.

5. Can you graph an inequality?

Yes, inequalities can be graphed on a number line or in the coordinate plane. The solution to the inequality will be represented by a shaded region or a dashed line on the graph.

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