Cho bieu thuc: ( x-1/ x+1 - x-1/x+1) : 2x / 3x - 3
a, Tim dieu kien xac dinh cua bieu thuc P
b, Rut gon bieu thuc P
c, Tim x thuoc z de P nhan gia tri nguyen.
Tim n thuoc N de n1975+n1973+1 co gia tri la mot so nguyen to
tim n thuoc z de 32n+3+24n+1 chia het cho 25
tìm x thuoc z de A co gia tri nguyen A =(5x - 2)/ (x - 2)
tim gia tri x nguyen de bieu thuc (3x2-4x+x-1)/(3x+2) co gia tri nguyen
tim gia tri x nguyen de bieu thuc (3x3-4x2+x+1)/(x-4) co gia tri nguyen
cho phan thuc 2n2-5n+3/2n+5
tim n de x nguyen
tim x de P nhan gia tri nguyen
P= \(\frac{x^2+7x}{x^2-49}\)
1. hinh thoi co chu vi =25 cm .độ dai canh cua hinh thoi la ? cm
2.gia tri nho nhat 2x2-8x+5 dat tai x = ?
3.gia tri lon nhat cua 8x-2x2+5 dat tai x =?
4. tap hop cac gia tri cua n de 2n2-n+4 chia het cho 2n+1 la ?
cho A = 5 / can bac 2 cua x - 3
tin x thuoc z de A co gia tri nguyen
căn bậc 2 của x rồi trừ cho 3
