xet tap e gom cac so tu nhien , moi so deu co nam chu so xep theo thu tu ko giam va tap cac chu so cua no la { 1,3,5,7}.
a) mo ta tap e bang cach liet ke cac phan tu cua no,
b) goi n la so lon nhat trong tap e . bieu dien n thanh tong gia tri cac chu so cua no .
nho cac ban giup minh nhe
1.tim x thuoc N biet:
a)(2x+1)mu 3=125 b)(x-5)mu 4=(x-5)mu 6 c)2 mu x-15=17 d)(7x-11)mu 3=2 mu 5. 5mu 2+200
2.viet cac tich sau hoac thuong duoi dang luy thua cua mot so:
a)2 mu 5 . 8 mu 4 b)25.125 c)25 mu 5:25 mu 7
3.viet cac tich, thuong sau duoi dang luy thua:
a) 2 mu 10:8 mu 3 b)12 mu 7:6 mu 7 c)5 mu 8:25 mu 2
4.tinh gia tri cac bieu thuc sau:
a mu3 . a mu 9 (a mu 5)mu7 (a mu 6)mu 4. a mu 12 4.5 mu 2-2.3 mu 2
1. viet duoi dang luy thua
a,3.3.3.3.3
b.2.x.2.x.2.x.x
c.a.a+b.b.b+c.c.c.c
d.9500.....0 +198300....0
13 chu so 0 30 chu so 0
goi p l tap hop cac so tu nhien le ,lon hon 3 nhung ko lon hon 9.
a) mo ta tap hop p bang 2 cach ,
b) bieu dien cac phan tu cua tap hop p tren cung mot tia so.
tim so tu nhien n biet n thuoc N*\(\)
A=111...1211...1 la hop so (co n thua co 1)
mong cac thay co cung cac ban giup em bai nay
sa p xep luy thua tu lon den be
\(2^{100}< 3^{75}< 5^{50}\)
ca c ba n so sa nh ra roi ha y la m cho mk nhe
mot so hai chu so , trong do hieu cua chu so hang don vi va chu so hang chuc bang 8.hoi do la so nao ?
so sanh hai so 333^444 và 444^333
viet duoi dang luy thua
64^2.4^12.16^4