$$\sum_{n=0}^{ $\infty$ }{(-1)^n}$$
suppose n is the sum of square of two integers ' prove that 2n must be the sum of square of the two integers
1525*10-525*329
3 31/28
sqrt(-ln(3 x-3))
A factory worker earns (5x^2-2x+1 ) pesos for working (x+2) hours. How much does he earn per hour?
(m-1)(5m-8)
0,33 a la cuarta
.Prove that Q[x] / \langlex ^ 2 + 1\rangle is isorphi mthe subfield of com plex numbers Q(i)=\ a ne bi |a,b in Q\
1