Các câu hỏi tương tự
can bac 2 cua x2 = a ( a<0 ) tìm x
cho cac so a,b>0.CMR: can bac hai cua a + can bac hai cua b > can bac hai cua a+b
Chung to rang da thuc f(x) co tong cac he so cua cac hang tu bac chan bang tong cac he so cua cac hang tu bac le Thi x=-1 la not nghiem cua da thuc
so sanh 4+ can bac hai cua13 va can bac hai cua 39+ canbac hai cua 14
Tim x biet : can bac 2 cua 7 -x =x-1
bac cua da thuc M=x^6+2x^2y^3-x^5+xy-xy^5-x^6
bac cua da thuc M=x^6+2x^y^3-x^5+xy-xy^5-x^6
tim x thuoc Q biet:x-2can bac 2 cua x=0
thu gon va tim bac cua don thuc 2xy(x^2yz)