N=( 20 nad 7) - symbol Newtona
N=20!/ 7!*13! =14*15*16*17*18*19*20 / 1*2*3*4*5*6*7 =
= 4*17*3*19*20 = 77 520
V7do 20 = 20!/7!* 13! = 13!x14x15x16x17x18x19x20/ 1x2x3x4x5x6x7 * 13!
= 390700800/5040 =77520
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N=( 20 nad 7) - symbol Newtona
N=20!/ 7!*13! =14*15*16*17*18*19*20 / 1*2*3*4*5*6*7 =
= 4*17*3*19*20 = 77 520
V7do 20 = 20!/7!* 13! = 13!x14x15x16x17x18x19x20/ 1x2x3x4x5x6x7 * 13!
= 390700800/5040 =77520