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d= 2
a= 23
S= suma
S= n/2 [2a+(n-1)d]
S= 25/2 [2 (23) + (25-1)2]
S= 25 [23 +(24)2]
S= 25 [23+48]
S= 25 [ 71]
S= 1775
R= La suma termina en 1775