Question

prove that nc0=1 regarding binomial theorem

Answer 1

we all know that
nCr = n! ÷ (n-r)!*r!
now,
nC0 = n! ÷ (n-0)!0!
nC0 = n! ÷ n!*1 [0! = 1]
nC0 = n! ÷ n!
nC0 = 1
hence proved
;-)