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NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
22 tháng 9 2023
\(\dfrac{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}\) + \(\dfrac{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}\) = 1 + 1 = 2
NT
3
TN
12 tháng 1 2016
\(9^9*9^8*9^7*9^6*9^5*9^4*9^3*9^2*9^1*9^0=\)99+8+7+6+5+4+3+2+1+0 = 945
CC
2
H
16 tháng 1 2015
1+9+9^2+9^3+9^4+9^5+9^6+9^7+9^8+9^9
=(1+9)+9^2(1+9)+....+9^8(1+9)
=10+9^2.10+.....+9^8.10
=10.(1+9^2+.....+9^8) =>tổng này chia hết cho 10
16 tháng 1 2015
1+9 +9^2+ 9^3+ 9^4+ 9^5+ 9^6+ 9^7+ 9^8+ 9^9=(1+9)+(9^2+9^3)+(9^4+9^5)+(9^6+9^7)+(9^8+9^9)
=10+9(1+9)+9^2(1+9)+9^4(1+9)+9^6(1+9)+9^8(1+9)
=10+9*10+9^2*10+9^4*10+9^6*10+9^8*10
=10(1+9+9^2+9^4+9^6+9^8) chia het cho 10
suy ra 1+9+9^2+9^3+9^4+9^5+9^6+9^7+9^8+9^9 chia het cho 10
DK
0
9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
=\(9+\left(-9\right)+\left(-9\right)+...+\left(-9\right)\) (có 36 số hạng -9)
=\(9+\left(-9\right)\times36\)
=9+(-324)
=(-315)
Là -315
Kinh Văn Hoàng.
Tên của một người đưa ra câu trả lời thót tim tương đương với hot chim
Chim này là cờ him
hien nay con 5 tuoiva hieu so tuoi cua 2 bo con la 24 tuoi. hoi khi nao thi tuoi bo gap 3 lan tuoi con
0 con cá
9-9-9-9-9-9-9-9-
9-9-9-9-9-9-9-9-9-9-9-9-9-9
-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
= (-315)
Trả lời
= -315
Học tốt nhé bạn
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-315 nha bạn
0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-00-0-0-0-0-0-0-0-0-0-00-0-=bao nhiêu
9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
=9+(−9)+(−9)+...+(−9)9+(−9)+(−9)+...+(−9) (có 36 số hạng -9)
=9+(−9)×369+(−9)×36
=9+(-324)
=(-315)