99999% cũa 9999999999
CA
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Tính: \(T=9^9+9^{99}+9^{999}+9^{9999}+9^{99999}+9^{999999}+........+9^{9999999999}+9^{9999999999}+9^{999999999999}+9^{999999999999}\)
9+99+999+9999+99999+999999+9999999+99999999+999999999+9999999999 = ?
9 . 1 + 9. 11 + 9.111 + 9.1111 + 9.11111 + 9.111111 + 9.1111111 + 9.11111111 + 9.111111111 + 9.1111111111
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9+99+999+9999+99999+999999+9999999+99999999+999999999+9999999999
tính nhanh
= (10-1) + (100 -1) + (1000-1) + (10000-1) + ............+ (10000000000-1)
= ( 10+100+1000+10000+..........+10000000000) - (1+1+1+1+..........+1+1)
=11111111110 - 1.10
=1111111100
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= (10-1) + (100 -1) + (1000-1) + (10000-1) + ............+ (10000000000-1)
= ( 10+100+1000+10000+..........+10000000000) - (1+1+1+1+..........+1+1)
=11111111110 - 1.10
=1111111100
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cho bieu thuc A+9999999999/2-9999999999/3-9999999999/6.so sánh A với 0
\(A=\frac{\text{9999999999}}{2}-\frac{\text{9999999999}}{3}-\frac{\text{9999999999}}{6}\)
\(A=\text{9999999999}\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)
\(A=\text{9999999999}.0\)
\(A=0\)
Vậy A = B
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A = 0 nhé bạn tôi thề là đúng luôn
bạn ko cần cảm ơn đâu cho 1 k là ok
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Cho biểu thức : A=999999999/2+9999999999/3+9999999999/6
\(\frac{9999999999}{2}+\frac{9999999999}{3}+\frac{9999999999}{6}\)
\(=9999999999\cdot\left(\frac{1}{2}+\frac{1}{3}+\frac{1}{6}\right)\)
\(=9999999999\cdot1\)
\(=9999999999\)
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Cho biểu thức: \(A=\frac{9999999999}{2}-\frac{9999999999}{3}-\frac{9999999999}{6}\)
So sánh A với số 0 ?
Nhân xét biểu thức A, ta thấy:
\(\frac{9999999999}{2}>\frac{9999999999}{3}>\frac{9999999999}{6}>0\)
=> \(A>0\left(đpcm\right)\)
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ta có 9999999999/2=9999999999*3/2*3
9999999999/3=9999999999*2/3*2
suy ra 9999999999*3/2*3 - 9999999999*2/3*2=9999999999*3-9999999999*2/6=9999999999/6
suy ra A=9999999999/6-9999999999/6=0
vậy A=0
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\(A=9999999999.\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)
\(A=9999999999.0=0\)
Vậy A=0
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9999999999+9999999999=?
Ai nhanh mình tick nhớ kb á
=19999999998 nhé
chúc bạn học tốt
9999999999+9999999999=?
Ai nói được sẽ kết bạn với tôi!!😘
= 19999999998
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9999999999 x 9999999999 = ?
ai nhanh nhất và đúng nhất mình tick lunm
9999999999x9999999999=99999999980000000001
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