Considera ca ai radicalul mare
√(1+1/7 +1/7 + 1/2 +1/7 +1/3+.........+ 1/7+1/252 - 1-1/2-1/3-….........-1/252=√(1/7+1/7+1/7+......1/7)=√1/7*252=√36=6//////am obtinut asa fiindca am desfacut fractiile in 1/7=1/7 , 9/14=9/2*7=1/2 +1/7, 10/21=10/7*3=1/7 +1/3..... Etc