say R1, R2,...., Rn are commutative rings with unity. Show that U(R1 + R2 +.... +...

say R₁, R₂,...., R_n are commutative rings with unity. Show that U(R₁ + R₂ +.... + R_n) = U( R₁) + U(R₂)+ .... U(R_n). Where U - is the units of the ring.

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Colby Messinger answered 1 year ago

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