cau 1:tinh gia tri bieu thuc
3/4 +1/1/4 *2/2/3-(-1/2)^2:6/5
cho ma co 2 dau/la hon so,con 1 dau la phan so,con ^2 la mu 2
cau 2:tim x biet
( x-1)^5= -32
cho ^5 co nghia la mu 5
vd nhak: mìn có bài toán thế này nhé:|x+1|-|x-5|
lap bang xet dau
x | -1 5 |
x+1 | -0 + + |
x-5 | - - 0 + |
-hai dau - dau tien cua hang 2 va 3 la cua -1
-so 0 cua hang 2 va3 la cua: -1+1 va 5-5
-dau + dau tien cua hang 2 la: 5+1=6 la so suong
-dau - thu 2 cua hang 3 la:-1-5=-6 la so am
-Vay 2 dau + o cuoi ma minh da gach chan la gi vay?????????
MOng cac bn giup minh vs,minh can gap lam
Cho bieu thuc :
C = ( 1 - 3x ) . x - 2x . ( x - 1 ) + 8
a ) Thu gon C
b ) Tinh gia tri bieu thuc voi x = -3
c ) Tim x de C = 8
d ) Tim ngiem cua C
dau . la dau nhan nha cac bn
nhanh nhanh nha mk dang can gap
1,tim ba so x,y,z.bt rang:
x/2=y/3,y/4=z/5(dau / la phan)
2,tim 2 so x,ybt:x:2=y:(-5) va x-y=7
nhanh thi tick
Tim GTNN
A = 5 /x-2/ + 2016
dau / .. / la gia tri tuyet doi
3 - /x + 1/2 / = 5/ 4
/ dau tien la dau gia tri tuyet doi
1/7=8/-x
3x/9=2/6
4/2/5:(-33/10)+x=-1/5/6
(x-2/1/4):(-5/6)=3
-8:(4/1/5x+3/10)=4/4/9
(5,5x-44):(-3/2)=30
(13/10x-15).(-5/14)=3
1/3.(x+5/2)=-2
chu y dau( //)la so tap phan con dau( /) la phan so
cho tam giac abc vuong tai a,duong phan giac ce cua goc c.ke ef vuong goc voi bc (f thuoc bc)gọi h là giao diem của ac và fe.cau hoi 1:tam giac fce bang tam giac ace .cau hoi 2:eh bang eb.cau hoi 3:chung minh ea be hon eb .dau cham la viet hos chu ko phai la dau nhan
Tim x, y
a. /x/ + x =\(\frac{1}{3}\)
b. /x-2/=2
// la dau tuyet doi