Diketahui
A = ⎧2 a⎫ , B = ⎧4 1⎫ , C = ⎧3 5⎫
⎩-1 3⎭ ⎩b 5⎭ ⎩2 4⎭
dan Cᵀ yaitu transpos matriks C.
Pembahasan:
A + B = 2Cᵀ
⎧2 a⎫ ₊ ⎧4 1⎫ ₌ 2⎧3 2⎫
⎩–1 3⎭ ⎩b 5⎭ ⎩5 4⎭
⎧6 a+1⎫ ₌ ⎧6 4⎫
⎩–1+b 8⎭ ⎩10 8⎭
a + 1 = 4 ⇒ a = 3
-1 + b = 10 ⇒ b = 11
Kaprikornus, a × b = 3 × 11 = 33