ta có :1+(1/2+1/2+........+1/32)
1+(1/2*3*4*5......*32)
=>1/2*3*4*....*32<1
vậy 1+1/2+1/3+1/4+........+1/32<3
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cho A=1/3^2-1/3^4+1/3^6-1/3^8+...+1/3^2014-1/3^2016 . Chung minh rang A < 0,1 . Hay tong quat bai toan
Minh dang can gap
Giup minh bai nay nha !^-^
Xem chi tiết
Chung minh rang :
1/2-1/4+1/8-1/16+1/32-1/64 nho hon 1/3
Ban nao nhanh tay se nhan duoc LIKE!
bai 1 tim so tu nhien nho nhat sao cho khi chia cho 3 du 1 ;4 du 2 ; 5 du 3; 6 du 4 va chia het cho 11
bai 2 chung minh rang 1/22+ 1/32+1/42+......+ 1/1002 be hon 1
bai 3 cho 3n+ 1 la boi cua 10 ( n thuoc Z+)chung minh 3n+4+1 la boi cua 10
giup minh voi !!!!
chung minh rang 1/2-1/4+1/8-1/16+1/32-1/64<1/3
bai 1 : tim n thuoc N biet:
( 2n+1)^3 = 729
bai 2: chung to rang :
(2015 +2015^2+2015^3+2015^4+2015^5+2015^6) chia het cho 2016
cac cau nho giai chi tiet nha
chung minh rang
a,1/2-1/4+1/8-1/16+1/32-1/64<1/3
bai 5 : tinh
a) tim x , biet (x+1) +(x+2 ) + ...+(x+100)=5750
b) chung minh rang B = 1/2^2 + 1/3^2 + 1/4^2 + ...+1/2021^2 < 1
giup mik luon voi
giup to giai bai toan nay voi to phai nop bai gap:chung minh rang so viet boi 100 chu so 1 tiep theo la 100 chu so 2 la TICH cua 2 so tu nhien lien tiep
Toan 6: chung minh rang: (1+3+3^2+3^3+...+3^35) chia het cho 520?