,UPP]CASE ,SIGMA ,EXAMPLES #1_4 ,UPP]CASE SIGMA IS WRITT5 .,S #2_4 ,! SUM ;I EQUALS "O 6FIVE ( F\R ;I M9US TWO IS WRITT5 ".,S%I .K #1<5]4I-2 #3_4 ,L[]CASE SIGMA EQUALS ! SQU>E ROOT ( OP5 FRAC;N UPP]CASE SIGMA OP5 P>5!SIS ;X M9US ;X B> CLOSE P>5!SIS SQU>$ OV] ;N M9US #1 IS WRITT5 .S .K >?.,S(X-X:)^2"/N-1#] #A