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Show that if ab(modm)andcd(modm), then a+cb+d(modm).

Short Answer

Expert verified

a+cb+dmodm.

Step by step solution

01

Step 1

abmodm(a-b)=km for some integer k.

cdmodm(c-d)=lmfor some integer I.

02

Step 2

Thus,

(a+c)-(b+d)=(a-b)+(c-d)=km+lm=(k+l)m

Hence, role="math" localid="1668497438268" a+cb+dmodm.

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