can gap toan
bai1; giai pt:
$ C^{1}_{x} + 6C^{2}_{x} + 6C^{3}_{x} = 9x^{2} - 14
$bai2" rut gon:
$ C^{0}_{5}.C^{k}_{n} + C^{1}_{5}.C^{k - 1}_{n} +.....+ C^{5}_{5}.C^{k - 5}_{n}
$. Biet:
$C^{n}_{n} + C^{n - 1}_{n} + C^{n - 2}_{n}= 79
$
Nhị thức Niu-tơn
can gap toan
bai1; giai pt: C^{1}_{x} + 6C^{2}_{x} + 6C^{3}_{x} = 9x^{2} - 14bai2" rut gon: C^{0}_{5}.C^{k}_{n} + C^{1}_{5}.C^{k - 1}_{n} +.....+ C^{5}_{5}.C^{k - 5}_{n}. Biet: C^{n}_{n} + C^{n - 1}_{n} + C^{n - 2}_{n}= 79
Nhị thức Niu-tơn
can gap toan
bai1; giai pt:
$ C^{1}_{x} + 6C^{2}_{x} + 6C^{3}_{x} = 9x^{2} - 14
$bai2" rut gon:
$ C^{0}_{5}.C^{k}_{n} + C^{1}_{5}.C^{k - 1}_{n} +.....+ C^{5}_{5}.C^{k - 5}_{n}
$. Biet:
$C^{n}_{n} + C^{n - 1}_{n} + C^{n - 2}_{n}= 79
$
Nhị thức Niu-tơn