If x ∅ y = x² y/3, then
• 3 ∅ (-1) = 3² (-1)/3 = -3
• 2 ∅ (3 ∅ (-1)) = 2 ∅ (-3) = 2² (-3)/3 = -4
if A and B are positive integer and A∆B =A(A+2B) , what is the value of 2∆(4∆(1∆B)} ?
If A ∆ B = A × (A + 2B) = A² + 2AB, then
• 1 ∆ B = 1 + 2B
• 4 ∆ (1 ∆ B) = 4 ∆ (1 + 2B) = 24 + 16B
• 2 ∆ (4 ∆ (1 ∆ B)) = 2 ∆ (24 + 16B) = 100 + 64B
