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CBSE Class 12 Math 2009 Solved Paper

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Question : 4 of 29
Marks: +1, -0
If the binary operation * on the set of integers Z, is defined by a * b = a + 3b², then find the value of 2 * 4.
Solution:  
Given a∗b=a+3b2a * b = a + 3b^2 ∀ a,b ∊ z
Therefore, 2 * 4 = 2 + 3 × 424^2 = 50
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