A = 3-32+33-34+35-....-3100
3A = 32-33+34-35+36-.....-3101
4A = 3A + A = 3 - 3101
=> A = \(\frac{3-3^{101}}{4}\)
A = 3-32+33-34+35-....-3100
3A = 32-33+34-35+36-.....-3101
4A = 3A + A = 3 - 3101
=> A = \(\frac{3-3^{101}}{4}\)
5x + 4 - 3 . 5x +3 = 511 . 2
Giup mk vs nhe, giai dum luon nha
Chung minh rang:1/3-2/32+3/33-4/34+...+99/399-100/3100< 3/16 giup mik vs nhe! thanks ai giai dum mik tik cho2 tik lun
Tính nhanh : a) -1-2-3-4-5-.....-199-200-201-202 b) 1+2-3-4+5+6-7-8+9+10-11-12+13+98-99-100+101+102
Giai chi tiet giup minh nha !!! Minh tich cho !!
A=12+32+52+...+992
B=22+42+...+1002
cam on da giai dum. giai chi tiet hai phan ra
Cac ban giai giup minh bai nay voi
a 1+(-3)+2+(-4)+3+(-5)+...+98+(-100)
b 1+(-5)+2+(-6)+3+(-7)+...+99+(-103)
5/x+1-2y+3/4=1/5
Giai chi tiet giup minh nhe
Giải bài nay =cách tìm x cua lop 6.dung nang cao qua minh k hieu.cac pan giup minh giai ki chi tiet bai nay giup minh nha!
3.(x-2)2-25=2
1/3+2/32+3/33+.....100/3100
Cac ban giai giup minh bai ne nghen.Thank you
M=(5^9+5^8+5^7).(3^6+3^5+3^4+3^3+3^2+3) chung minh chia het cho 2015
giup minh giai ra nhe cam on