# Answer to Question #16642 in Discrete Mathematics for Lelouch Vi Brittania

Question #16642

Evaluate the following with explanation:

A. 11^2012 mod 10

B. 29^205 mod 10

C. ⇩⇩⇩

20

Σ x!mod 5

x=1

D. Draw diagram for the following relation aRb iff a is congruent to b mod 3 on the set {0,1,2,3,4,5}

E. ⇩⇩⇩

5

Σ n(n!)

i=1

F.⇩⇩⇩

5

Σ i^3

i+1

G. Show that the sum of consecutive positive integers is equal to n/2(n+1),∀n∈ N.

A. 11^2012 mod 10

B. 29^205 mod 10

C. ⇩⇩⇩

20

Σ x!mod 5

x=1

D. Draw diagram for the following relation aRb iff a is congruent to b mod 3 on the set {0,1,2,3,4,5}

E. ⇩⇩⇩

5

Σ n(n!)

i=1

F.⇩⇩⇩

5

Σ i^3

i+1

G. Show that the sum of consecutive positive integers is equal to n/2(n+1),∀n∈ N.

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