a) \(\left|x\right|< 5.\) Mà GTTĐ của 1 số \(\ge0\)
\(\Rightarrow\left|x\right|\in\left\{0;1;2;3;4\right\}\)
\(\Rightarrow x\in\left\{0;\pm1;\pm2;\pm3;\pm4\right\}\)
b) \(2\le\left|x\right|< 7\)
\(\Rightarrow\left|x\right|\in\left\{2;3;4;5;6;\right\}\)
\(\Rightarrow x\in\left\{\pm2;\pm3;\pm4;\pm5;\pm6\right\}\)
tim x : gia tri tuyet doi cua x = -3 + 5
Tim so tu nhien co hai chu so biet rang so do gap doi tich cac chu so cua no
Cac ban giup minh nha minh can gap
tinh gia tri bieu thuc 1999,1999+2001,2001
Tim hai so biet tong cua chung bang so lon nhat co ba chu so va hieu cua hai so do bang so lon nhat co hai chu so
Trung binh cong cua hai so bang 135. Biet mot trong hai so la 246. Tim so kia
tim x,biet:a,x2+3x+1⋮ x-1
b,18x+⋮7
c,4x-5⋮13
tim min
A=/X5-32/-17
B=/X-9/-X+15
C=/X-5/+X-3
tim max
D=17-/ /X/-2 /
Tonh cua 2 so tu nhien gap 3 lan hieu cua chung .Tim thuong cua 2 so tu nhien ay.
mot phep chia co thuong la 5 , so du la 7. tong cua so bi chia . so chia , thuong va so du la 67. tim so bi chia.