CBSE Class 12 Math 2009 Solved Paper

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 + 3b^2

∀ a,b ∊ z
Therefore, 2 * 4 = 2 + 3 ×

4^2

= 50

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