\(a,x\cdot7,2+4,5\cdot x=17,55\)
\(x\cdot\left(7,2+4,5\right)=17,55\)
\(x\cdot11,7\) \(=17,55\)
\(x\) \(=17,55:11,7\)
\(x\) \(=1,5\)
\(b,\left(x+5,2\right):3,2=4,7\left(0,5\right)\)
\(x+5,2=4,7\cdot3,2+0,5\)
\(x+5,2=15,54\)
\(x=15,54-5,2\)
\(x=10,34\)
BAI 1: TIM X BIET so tu nhien x/7 du 6. chung minh rang x.x/7 du 1
bai 2: cho 2.(a.a+b.b)=(a+b).(a+b) chung minh rang a=b
bai 1: tim x
a, x^2 +5x - 6=0
b , x^2 -x - 6 = 0
bai 2: phân tich thanh nhân tư
x^4 + 3x^2 + 4
bai 1:tim GTNN cua bieu thuc
A=x2+3x+7
B=(x-2)(x-5)(x2-7x-10)
bai 2:tim GTLN cua bieu thuc
A=11-10x-x2
B=[x-4](2-[x-4])
bai 3:tim x,y sao cho
A=2x2+9y2-6xy-6x-12y+2016 co GTNN
B=-x2+2xy-4y2+2x+10y-8 co GTLN
bai 4 :
a)cho x+y=3;x2+y2=5.tinh x3+y3
b)cho x-y=5;x2+y2=15.tinh x3-y3
Da thuc f(x) khi chia cho x+1 du 4 , khi chia cho x2+1 du 2x+3 . tim phan du khi chia f(x) cho (x+1).(x2+1)
khi chia x^8 cho x+1\2 duoc thuong B(x) du r1 khi chia b(x)cho x+1\2 duoc C(x) du r2 tim r2
khi chia x^8 cho x+1\2 duoc thuong B(x) du r1 khi chia b(x)cho x+1\2 duoc thuong C(x) du r2 tim r2
tim hang so a,b sao cho \(x^3\)+ ax +b chioa het cho x+1 du 7; chia cho x+1 du 4
tim p(x) biet p(x)/(x-2) du 3; p(x)/(x+2) du (-2); p(x)/(x^2 -4) thuong la x du
cho da thuc P(x) thoa man:khi chia cho x-3 du 17;khi chia cho x-1 du 3.Tim so du trong phep chia P(x) cho x^2-4x+3
