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If A(BC) = (AB)C, then with respect to multiplication this law is called

The refractive index of glass with respect to water is 1.12. The refractive index of glass with respect to air is 1.5 What will be the refractive index of water with respect to air

If a, b and c are integers, then according to associative law of multiplication ( a x b ) x c must be equal to

As per properties of real numbers with respect to multiplication, ab = ba and ∀ a, b ∈ R is

As per properties of real numbers with respect to multiplication, ab ∈ R and ∀ a, b ∈ R is

As per properties of real numbers with respect to multiplication, (ab)c = a(bc) and ∀ a, b, c ∈ R is

Law which does not hold in multiplication of matrices is known as