# Fill in the blank : If A = [2111]andA-1=[11x2], then x = _______ - Mathematics and Statistics

Fill in the Blanks

Fill in the blank :

If A = [(2, 1),(1, 1)] "and" "A"^-1 = [(1, 1),(x, 2)], then x = _______

#### Solution

If A = [(2, 1),(1, 1)] "and" "A"^-1 = [(1, 1),(x, 2)], then x = – 1.

Concept: Inverse of Matrix
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