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Home Questions WJ6DCC63XU
Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Relations and Functions

Question:
If * is a binary operation on a set of integers I defined by a * b = 5a + 4b – 2, then find the value of 4 * 5
Options:
37
38
39
40
Correct Answer:
38
Explanation:
5*4+4*5-2 = 20+20-2 = 40-2 = 38

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