Tim GTLN:
a) a = -2x^2 + 2003
b) B = 2/6 - x (x thuoc Z)
Những câu hỏi liên quan
Tim x thuoc Z de A thuoc Z va tim gia tri do .
a/ A= x+3/x-2 .
b/ A= 1-2x/x+3 .
\(\frac{6}{x-3}+\frac{2x^2}{^{x^2}-1}+\frac{6-2x}{x^{3^{ }}-3x^2-x+3}\)
a / Rut gon A
b/ Tim x thuoc Z de A thuoc Z
c/ Tinh gia tri cua A khi x = căn 2
tim x, y thuoc Z
sao cho x^6-x^4+2x^3+2x^2=y^2
\(x^6-x^4+2x^3+2x^2=y^2\)
\(y^2+y=x^4+x^3+x^2+x=0\left(1\right)\)
\(\Leftrightarrow y\left(y+1\right)=x\left(x^3+x^2+x+1\right)=0\)
Ta có 4 PT
\(x1=0;y1=0\)
\(x2=0;y2=-1\)
\(x3=-1;y3=0\)
\(x4=-1;y4=-1\)
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cho P=(2x-1)(x+2)/(2x+1)
Tim x thuoc Z để P thuoc Z
cho A = 1/15 nhan 225/(8+2) + 3/14 nhan 196/(3x+6) (x thuoc Z; x khac -2 )
a) Rut gon A
b) Tim x thuoc Z de A thuoc Z
c) trong cac gia tri nguyen A tim gia tri lon nhat va gia tri nho nhat
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
Tim x thuoc z de x2+2x+1 chia het cho x+6
\(x^2+2x+1=x^2+4x-4x+2x+1\)
\(x.\left(x+6\right)-4x+1\)
\(x.\left(x+6\right)-4x-24+25\)
\(x.\left(x+6\right)-4.\left(x+6\right)+25\)
=>25 chia hết cho x+6.
Học tốt^^
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\(x^2+2x+1=x^2+4x-4x+2x+1\)
\(x.\left(x+6\right)-4x+1\)
\(x.\left(x+6\right)-4x-24+25\)
\(x.\left(x+6\right)-4.\left(x+6\right)+25\)
=>25 chia hết cho x+6.
Học tốt^^
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\(x^2+2x+1=x^2+4x-4x+2x+1\)
\(x.\left(x+6\right)-4x+1\)
\(x.\left(x+6\right)-4x-24+25\)
\(x.\left(x+6\right)-4.\left(x+6\right)+25\)
=>25 chia hết cho x+6.
Học tốt^^
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tim x thuoc Z de a thuoc N:
\(a=\sqrt{2x^2-2x+5}\)
Cho:
Q=(\(\dfrac{2x-x^2}{2x^2+8}\)-\(\dfrac{2x^2}{x^3-2x^2+4x-8}\)).(\(\dfrac{2}{x^2}\)+\(\dfrac{1-x}{x}\))
a, Tim dieu kien xac dinh
b, rut on q
c, Tinh Q khi x=2017
d, Tim x thuoc Z de Q thuoc Z
GIUP MINH VOI CAN GAP LAM!!!