\(2000\div5\times5\)
\(200\div5\times5\)
\(5\times5\div5\)
5 x 5 :5
= 25 : 5
=5
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THÁCH CÁC BẠN:
\(5\times5\times5\times5\times5\times5\times5=?\)
AI NHANH MK TICK CHO
\((32-x\div5)\div13=2\)
Lời giải:
$(32-x:5):13=2$
$32-x:5=13.2=26$
$x:5=32-26=6$
$x=6.5=30$
\(A=\frac{100\times2^8\times5^{18}-2^{10}\times5^{19}\times15}{6\times2^8\times5^{19}+10\times2^8\times5^{18}}\)
Tìm số nguyên x, biết:
\(3\times5^{x+2}+4\times5^{x-3}=19\times5^{10}\)
Đề sai chắc luôn đoạn kìa là `3xx5^{x-2}` mới đúng
`3xx5^{x-2}+4xx5^{x-3}=19xx5^10`
`=>3xx5^{x-3+1}+4xx5^{x-3}=19xx5^10`
`=>3xx5xx5^{x-3}+4xx5^{x-3}=19xx5^10`
`=>15xx5^{x-3}+4xx5^{x-3}=19xx5^10`
`=>19xx5^{x-3}=19xx5^10`
`=>5^{x-3}=5^10`
`=>x-3=10`
`=>x=13`
Vậy `x=13`
tính nhanh: \(\frac{1\times3\times2\times4\times3\times5\times4\times6\times5\times7}{2\times2\times3\times3\times4\times4\times5\times5\times6\times6}\)
Tìm x,y bt
a,\(\left(2x-5\right)^{2000}+\left(3y+4\right)^{2002}\ge0\)
b,\(2^{x+1}\times3^y=12^x\)
c,\(10^x\div5^y=20^y\)
d,\(2^x=4^y-1vs27^y=3^x+8\)
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\(24\times5^5_{ }+5^2\times5^3\)
`24 xx 5^5 + 5^2 xx 5^3`
`=24 xx 5^5 + 5^5`
`=5^5 (24 +1)`
`=5^5 . 25`
`=5^5 .5^2`
`=5^7`
=24x3125 +\(5^2+5^3\)
=75000+ \(5^5\)
=75000+3125
=78125
\(24\cdot5^5+5^2\cdot5^3\)
\(=24\cdot5^5+5^5\)
\(=5^5\cdot5^2=5^7\)