English

State whether the following statement is true or false: If a < b, then ac > bc.

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Question

State whether the following statement is true or false:

If a < b, then ac > bc.

True or False
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Solution

This statement is false.

Given,

a < b

If c is a positive number,

Multiplying both sides by c we get,

ac < bc

If c is a negative number,

Multiplying both sides by c we get,

ac > bc [Using rule 4]

Hence, the statement is false.

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Chapter 4: Linear Inequations (In one variable) - EXERCISE 4 (A) [Page 41]

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Selina Concise Mathematics [English] Class 10 ICSE
Chapter 4 Linear Inequations (In one variable)
EXERCISE 4 (A) | Q 3. (iii) | Page 41
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