Let p be an odd prime. Show that if (p − 1) Xn, then 1 + 2 + + (p − 1) = 0 mod p

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Q: a) Solve it using Gauss' method. Solution: x + 3y + z + w = 6 -Y +2w=-4 2x + 5y + 2z+4w = 8 X +7w=-6…

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Q: Find a general solution to the system. 122 -6-9e-t x' (t) = 2 1 2 x(t) +-6-10e-t 221 -3-11e-t

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