Which Of The Following Is Not A Property Of Inequalities

Here are the list of Properties of Inequalities:

1. Additive property of inequality:

Adding the same value to both sides of the inequality does not change the inequality.

  • If p < q, then p + r < q + r
  • If p > q, then p + r > q + r
  • If p ( leq ) q, then p + r ( leq ) q + r
  • If p ( geq ) q, then p + r ( geq ) q + r

For example,

Numerical form:

5 < 9

5 + 2 < 9 + 2 (Adding 2 on both sides)

7 < 11

Algebraic form:

(y-3 > 2)

(y-3 + 3 > 2 + 3) (Adding 3 on both sides)

(y>5)

2. Subtraction property of inequality:

Subtracting the same value from both sides of the inequality does not change the inequality.

  • If p < q, then p – r < q – r
  • If p > q, then p – r > q – r
  • If p ( leq ) q, then p – r ( leq ) q – r
  • If p ( geq ) q, then p – r ( geq ) q – r

For example,

Numerical form:

3 < 6

3 – 2 < 6 – 2 (subtracting 2 on both sides)

1 < 4

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Algebraic form:

(x+5>11)

(x+5-5>11-5) (subtracting 5 on both sides)

(x>6)

3. Multiplication property of inequality:

Let’s take two positive numbers p and q. The inequality remains the same when both p and q are multiplied by the same positive number. When both p and q are multiplied by the same negative number, however, the inequality reverses.

  • If p < q and if r is a positive number, then p ( times ) r < q ( times ) r.
  • If p < q and if r is a negative number, then p( times ) r > q ( times ) r

For example,

Numerical form:

7 < 9

7(times)2 < 9(times) 2 (multiplying 2 on both sides)

14 < 18

Algebraic form:

( frac{x}{5}> 4 )

( frac{x}{5}times 5 > 4times 5 ) (multiplying 5 on both sides)

(x>20)

4. Division property of inequality:

Let’s take two positive numbers p and q. The inequality remains the same when both p and q are divided by the same positive number. When both p and q are divided by the same negative number, however, the inequality reverses.

  • If p < q and if r is a positive number, then ( frac{p}{r}< frac{q}{r} )
  • If p < q and if r is a negative number, then ( frac{p}{r}> frac{q}{r} )

For example,

Numerical form:

6 < 8

6 ( div ) 2 < 8 ( div ) 2 (dividing 2 on both sides)

3 < 4

Algebraic form:

(2x>4)

( frac{2x}{2}> frac{4}{2} ) (dividing by 2 on both sides)

(x>2)

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