\(=\dfrac{2^{16}\cdot3^9+3^8\cdot3\cdot5\cdot2^{18}}{2^9\cdot2^{10}\cdot3^9+2^{20}\cdot3^{10}}\)
\(=\dfrac{2^{16}\cdot3^9+3^9\cdot2^{18}\cdot5}{2^{19}\cdot3^9+2^{20}\cdot3^{10}}\)
\(=\dfrac{3^9\cdot2^{16}\left(1+2^2\cdot5\right)}{3^9\cdot2^{19}\cdot\left(1+2\cdot3\right)}=\dfrac{1}{8}\cdot\dfrac{21}{7}=\dfrac{3}{8}\)
a) \(\frac{2^{19}.2^{27}+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
b) \(\frac{\left(-\frac{1}{2}\right)^3-\left(\frac{3}{4}\right)^3-\left(-2\right)^2}{2.\left(-1\right)^5+\left(\frac{3}{4}\right)^2-\frac{3}{8}}\)
Rút gọn
1, So sánh A và B, biết :
A=\(\dfrac{2^{19}.27^3.15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
B=\(\dfrac{4}{35}+\dfrac{4}{63}+\dfrac{4}{99}+\dfrac{4}{143}+\dfrac{4}{195}\)
Thực hiện phép tính ( bằng cách nếu có thể )
a, -7/2 + 3/4 - 17/12
b, -1/12 - ( 21/8 - 1/3 )
c, -5/6 - ( -3/8 + 1/10 )
d, 1/2 + 3/2 . ( 5/6 )
e, 1/2 + ( -2/9 ) . 3
C=2^19.27^3+15.49.9^4
_______________________
6^9.2^10+12^10
Thực hiện phép tính:
a) \(-\frac{3^4.4^4}{2^2.6^2}\)
b) \(\frac{27^2.8^5}{6^6.32^3}\)
c) \(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}\)
Tính nhanh
\(\frac{4^6.3^4.9^5}{6^{12}}\)
\(\frac{3^{10}.11+9^5.5}{3^9.2^4}\)
2100-299-298-..-22-2
38:36+(22)4:29
1, Tìm x
a, (3x^2-50)^2=5^4
2, Rút gọn
a, (3^4-3^3)^4/27^3
b, 25^3/(5^5-5^3)^2
3, Thực hiện phép tính
a, (-1/3)^2 . 9 - (1/2)^3 .16 +(2:1/2^2)
b, (3/7)^10 . (7^5)^9 : (9/25)^5
c, (0,25)^5 . 2^11 : (1/3)^2
thực hiện phép tính:
(4+6+8+10...+2012)1/1000. (1/2+3/4+5/6)
giải giúp mình liền nha
Tính :
\(B=\frac{7}{4}\left(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\right)\)
\(C=\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
