CMR : C=4n^4+4n^3-3n^2-2n+1
D=n^4+4n^3+2n^2-4n+1
là số chính phương lẻ
rut gon phan thuc
a3+1
a2+3a+4
bai 1
a = (3x / 2x + 4 ) + (x +3 /x ^ 2 - 4 )
a . tim x de gia tri phan thuc a duoc xac dinh
b. rut gon a
c. tinh gia trin cua a khi x bang -3
d . tim gia tri cua x de phan thuc co gia tri bang 2
\(\frac{x^4-y^4}{y^3-x^3}\)
rut gon phan thuc
rut gon phan thuc A=(x^3-6x+7)/(x^3+5x^2-2x-24)
cho phan thuc \(\frac{x+1}{x^2+x}\)
a) tim dieu kien cua x de gia tri phan thuc duoc xac dinh
b) rut gon phan thuc
c) tinh gia tri phan thuc tai x = 2014
Rut gon bieu thuc
3(2^2+1)(2^4+1)(2^8+1)(2^16+1)
Rut gon phan thuc
a, 3x(1-x)\2(x-1)
b, 3(x-y)(x-z)^2\6(x-y)(x-z)
c, x^2-16\4x-x^2 (x#0,x#4)
a^3 + b^3 + 3abc - c^3 / (a+b)^2 - c^2 rut gon phan thuc dai so