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Let * Be a Binary Operation Defined by a * B = 3a + 4b − 2. Find 4 * 5. - Mathematics

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Question

Let * be a binary operation defined by a * b = 3a + 4b − 2. Find 4 * 5.

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Solution

Given: a * b = 3a + 4b − 2

Here, 

 4 * 5 = 3 (4) + 4 (5)\[-\] 2 

= 12 + 20 \[-\] 2 

= 30

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Chapter 3: Binary Operations - Exercise 3.6 [Page 36]

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RD Sharma Mathematics [English] Class 12
Chapter 3 Binary Operations
Exercise 3.6 | Q 17 | Page 36

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