Giai ho minh bai toan voi
De bai tinh gon bieu thuc: -1+7-7^2+7^3-...-7^200+7^201-7^202
co ai bet de thi violympic chinh thuc cap tinh lop 5 vong 17 nam 2015-2016 khong ? cho minh biet cai de voi minh chop nguoi do tram like [ nmoi ngay cho mot like ] guiup minh nha bai nay ung voi gia tri ca tram like day
baif2 don gian bieu thuc
(-75)-(p+20)+95
Bai 1
Thuc hien phep tinh
a,(135-35) .(-47)+53 .(-48-52)
b,25 .(75-49)+75 .|25-49|
Bai 2
Tim x\(\varepsilon\)Z biet
a,(-x+31)-39=-69+11
b,x-{57-[42+(-23-x)]}=13-{47+[25-(32-x)]}
c,|2-x|+2=x
Giup minh voi
tinh gia tri bieu thuc
a) A= 5a3b8 voi a = -1, b = 1
b) B= -9a4b2voi a = -1, b =2
tim x biet:
a, 8x - 75 = 5x + 21
b, 9x + 25 = -( 2x - 58 )
c, / 2x - 1 / = /-5/
Giup minh lam bai nay voi ca cach lam nua nhe
-2-(x-17)=34-(-x+25)
ai tra lop giup minh bai nay minh se like cho
Bai 1: Don gian bieu thuc sau:
a, x - y - (- y + a + x)
b, (-90) - (b + 10) +100
bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen
a)x+3/x-2
b)x2+3x-2/x+2
chu y:dau / la dau chia trong phan so
bai 2:cho A=2n+1/n-2 voi n la so nguyen
a)tim n de a la phan so
b)tim n de A nguyen
c)tinh gia tri cua A biet:n=2;1;-2;-1
giup minh voi minh dang can.Ai dung minh tick cho
