If \(A=\left[\begin{array}{ll}1& 2a\\ -8 & b+1\end{array}\right]\) and \(B=\left[\begin{array}{ll}1 &-6\\ -8 &13\end{array}\right]\) are equal matrices, then the value of \(a\) and \(b\) are respectively
Answer & explanation
Correct answer: option 3
Two matrices are equal if and only if they are equal entry wise.
2a = -6
a = -3
b + 1 = 13
b = 13 - 1 = 12