" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
b = 1
U50 = 2x + 50
S50 = 4275
Sn = n/2 (a + Un)
S50 = 50/2 (2x+1+2x+50)
4275 = 25 (4x + 51)
4275/25 = 4x + 51
171 = 4x + 51
171-51 = 4x + 51-51
120 = 4x
120/4 = x
30 = x