A binary operation is defined by a b a 3b 2 Fin... - JAMB Mathematics 2019 Question
A binary operation Δ is defined by a Δ b = a + 3b + 2.
Find (3 Δ 2) Δ 5
A
35
B
59
C
28
D
87
correct option: c
a Δ b = a + 3b + 2
(3 Δ 2) Δ 5 = (3 + 3(2) + 2) Δ 5
= 11 Δ 5
= 11 + 3(5) + 2
= 28
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