so gia tri cua x thoa man |x-1|+|2x-6|=12
tim gia tri cua bieu thuc X=2x^5-5y^3+2015 tai x,y thoa man /x-1/=(y+2)^20=0
gia tri cua x thoa man 2x+2/3x-6 = 2x-6/3x-15
Gia tri x thoa man : x/-8 = -18/x la...
tinh gia tri bieu thuc A tai x=-1/2; y=4;z=6
A=x^2y+(-x^3-3xyz)-(4-3xyz)+(-14^15)^0
Cho 3 so khac nhau va khac 0 thoa man \(\dfrac{a}{b+c}=\dfrac{b}{a+c}=\dfrac{c}{a+b}\).Khi do gia tri cua \(P=\dfrac{b+c}{a}+\dfrac{a+c}{b}+\dfrac{a+b}{c}\)
tinh gia tri bieu thuc A tai x=\(\dfrac{-1}{2}\);y=4;z=6
A=x\(^2\)y+(-x\(^3\)-3xyz)-(4-3xyz)+(-14\(^{15}\))\(^0\)
tinh gia tri bieu thuc A tai x=\(\dfrac{-1}{2}\);y=4;z=6
A=x\(^2\)y+(-x\(^3\)-3xyz)-(4-3xyz)+(-14\(^{15}\))\(^0\)
Tim x de gia tri cua cac bieu thuc sau =0
a. x^3-x^2-4x-4
b. x^3-x^2+2x-2
c. x^3+6x^2+11x+6