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calculati P3+2P5-P7,p-inseamna permutare

Răspuns :

Slavitescudora
P3=3!=1×2×3=6
P5=5!=1×2×3×4×5=120
P7=7!=1×2×3×4×5×6×7=120×42=5040
6+2×120-5040=6+240-5040=246-5040= -4794
Sper ca te-am ajutat
Ema582001
3!+2* 5!-7!= 3! (1+2*4*5-4*5*6*7)
* inseamna inmultire