5.2
Chứng minh rằng x, y là 2 STN liên tiếp, biết:
\(x=5.2^{2020}-5.2^{2018}+5.2^{2016}-...-5.2^6+5.2^4-5.2^2+5;\) \(y=2^{2022}\)
Thứ hai tuần sau em nộp các thầy cô giúp em với
[130-3.(5.2-5.2)]:2
[ 130 - 3 x ( 5 x 2 - 5 x 2 ) ] : 2
= [ 130 - 3 x 0 ] : 2
= [ 130 - 0 ] : 2
= 130 : 2
= 65
1/5.2^x+1/3.2x+1=1/5.2^7+1/3.2^8
Các bạn giúp mik với nhé , thank you mọi người.
mk cũng đang cần câu tương tự như vậy
bạn ở đội tuyển toán à
Tính nhanh
a. 96.4+4.4+96.0
b.78.5+5.2
c.5.2+8.9
a , 96 . 4 + 4 . 4 + 96 . 0
= 4 . ( 96 + 4 ) + 0
= 4 . 100
= 400
b , 78 . 5 + 5 . 2
= 5 . ( 78 + 2 )
= 5 . 80
= 5 . 2 . 40
= 10 . 40
= 100
c , 5 . 2 + 8 . 9
= 10 + 72
= 82
\(C=\dfrac{5.2^9.6^{19}-7.2^{29}.27^6}{5.2^{25}.9^9-4.3^{20}.8^9}\)
Ta có: \(C=\dfrac{5.2^9.6^{19}-7.2^{29}.27^6}{5.2^{25}.9^9-4.3^{20}.8^9}\)
\(=\dfrac{5.2^9.2^{19}.3^{19}-7.2^{29}.3^6.9^6}{5.2^{25}.3^9.3^9-4.3^{18}.3^2.2^9.2^9.2^9}\)
\(=\dfrac{5.2^{28}.3^{19}-7.2^{28}.2.3^{18}}{5.2^{25}.3^{18}-4.3^{18}.3^2.2^{25}.2^2}\)
\(=\dfrac{5.2^{28}.3^{18}.3-7.2^{28}.2.3^{18}}{3^{18}.2^{25}\left(5-4.3^2.2^2\right)}\)
\(=\dfrac{2^{28}.3^{18}\left(15-14\right)}{3^{18}.2^{25}\left(-139\right)}\)
\(=\dfrac{2^{25}.2^3}{2^{25}\left(-139\right)}=\dfrac{-8}{139}\)
Vậy \(C=\dfrac{-8}{139}.\)
Các bạn ơi mình cần gấp lắm ai giải được mình cho 3 like luông mình nói là giữ lời không thì mình cho các bạn nick này của mình
tính\(\frac{5.2^{30}.3^{18}-4.3^{20}.2^{27}}{5.2^9.3^{19}-7.2^{29}.3^{18}}\)
Tính : \(\dfrac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
\(=\dfrac{5\cdot2^{30}\cdot3^{18}-2^{29}\cdot3^{20}}{5\cdot2^{28}\cdot3^{19}-7\cdot2^{29}\cdot3^{18}}\)
\(=\dfrac{2^{29}\cdot3^{18}\left(5\cdot2-9\right)}{2^{28}\cdot3^{18}\left(5\cdot3-7\cdot2\right)}=2\)
Tính
\(\frac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
=2
bạn bấm máy tính hoặc tính theo kiểu rút gọn cũng ra
Tính : \(\dfrac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)
\(\dfrac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}=\dfrac{5.2^{30}.3^{18}-2^{29}.3^{20}}{2^{28}.3^{19}.5-7.2^{29}.3^{18}}=\dfrac{2^{29}.3^{18}\left(5.3+3^2\right)}{2^{28}.3^{18}\left(3.5+7.2\right)}=\dfrac{2.24}{29}=\dfrac{48}{29}\)
Tính nhanh \(\frac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.6^{19}-7.2^{29}.27^6}\)
tố uyên sai rồi
\(\frac{5.2^{30}.3^{18}-2^{^2}.3^{^{20}}.2^{^{27}}}{5.2^{^9}.6^{^{19}}-7.2^{^{29}}.27^{^6}}\)
\(=\frac{5.2^{^{30}}.3^{^{18}}-2^{^{29}}.3^{^{20}}}{5.2^{^9}.2^{^{19}}.3^{^{19}}-7.2^{^{29}}.\left(3^{^3}\right)^6}\)
\(=\frac{5.2.2^{^{29}}.3^{^{18}}-2^{^{29}}.3^{^2}.3^{^{18}}}{5.2^{^{28}}.3^{^{19}}-7.2^{^{29}}.3^{^{18}}}\)
\(=\frac{2^{^{29}}.3^{^{18}}\left(2.5-3^{^2}\right)}{5.2^{^{28}}.3.3^{^{18}}-7.2.2^{^{28}}.3^{^{18}}}\)
\(=\frac{2^{^{29}}.3^{^{18}}.\left(10-9\right)}{2^{^{28}}.3^{^{18}}.\left(5.3-7.2\right)}\)
\(=\frac{2^{^{29}}.3^{^{18}}}{2^{^{28}}.3^{^{18}}}=2\)
Học tốt
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