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Calculati:
(1*2*3*.....*15):(1+2+3+...+15)

P.S nu stiu cum se face suma lui gauss cu inmultire


Răspuns :

(1*2*3*.....*15):{15x[(15+1):2] } =
(1*2*3*...*15):[15*(16:2)] =
(1*2*3*...*15):(15*8)=
(1*2*3*4*5*6*7*9*10*11*12*13*14)=
=2*12*30*63*110*156*14=
=24*1890*110*2184=
=45360*240240=
=10897286400