\(a.\)
\(\left(\frac{2}{3}\right)^3=\frac{2^3}{3^3}=\frac{8}{27}\)
\(b.\)
\(\left(-2\frac{3}{4}\right)^2=\left(-\frac{11}{4}\right)^2=\frac{121}{16}\)
\(c.\)
\(\left(0,6\right)^4=0,1296\)
\(d.\)
\(\left(-\frac{1}{2}\right)^4=\frac{1^4}{2^4}=\frac{1}{16}\)
\(e.\)
\(\left(-\frac{1}{2}\right)^5=-\frac{1^5}{2^5}=-\frac{1}{32}\)
1. Tính.
a) \(\left(\frac{2}{3}\right)^3\) b) \(\left(-2\frac{3}{4}\right)^2\) c) (0,6)\(^4\) d) \(\left(\frac{-1}{2}\right)^4\) e) \(\left(\frac{-1}{2}\right)^5\)
2. viết mỗi số \(\frac{81}{125}\) ; \(\frac{-8}{27}\) dưới dạng 1 lũy thừa.
b) viết các số: (0,36)\(^3\) : b) \(\left(-\frac{4}{11}\right)^2\) : c) (0,5)\(^4\) . 6\(^4\) : d) \(\left(\frac{2}{5}\right)^5.x=\left(\frac{2}{5}\right)^8\)
3. tìm x
a) x : \(\left(\frac{3}{4}\right)^3=\left(\frac{3}{4}\right)^2\) b) \(\left(\frac{2}{5}\right)^5.x=\left(\frac{2}{5}\right)^8\)
giúp mk nhé mai mk nộp bài tp r thanks
Giúp mik nka
Bài 1: Tính giá trị của biểu thức ( hợp lí nếu có thể)
a/ |-10| : (-2): (-5)+(-3)2
b/ 1+ (-2) +3 +(-4) + 5+ (-6)+....+ 21 (-22)
c/ \(\frac{3}{4}.\frac{5}{9}+\frac{3}{4}.\frac{4}{9}\)
d/ \(\frac{-4}{17}+\frac{5}{19}+\frac{-13}{17}+\frac{14}{19}+\frac{3}{115}\)
e/ \(\left(\frac{3}{4}+\frac{-7}{2}\right).\left(\frac{10}{11}+\frac{2}{22}\right)\)
Thanks. Nhanh hộ mik
Tính:
a) \(\left(\frac{3}{7}+\frac{1}{2}\right)^2\)
b) \(\left(\frac{3}{4}-\frac{5}{6}\right)^2\)
c) \(\frac{5^4.20^4}{25^5.4^5}\)
d) \(\left(\frac{-10}{3}\right)^5.\left(\frac{-6}{5}\right)^4\)
e) \(\left(1+\frac{2}{3}-\frac{1}{4}\right).\left(\frac{4}{5}-\frac{3}{4}\right)^2\)
f) \(2:\left(\frac{1}{2}-\frac{2}{3}\right)^3\)
Tính:
a) \(\frac{4^2.4^3}{2^{10}}\)
b) \(\frac{\left(0,6\right)^5}{\left(0,2\right)^5}\)
c) \(\frac{2^7.9^3}{6^5.8^2}\)
d) \(\frac{6^3+3.6^2+3^3}{-13}\)
e) \(\frac{5^4.20^4}{25^5.4^5}\)
HELP ME!
Tìm x thuộc Q biết:
a) 6,5 - \(\frac{9}{4}\): |x+\(\frac{1}{3}\)| = |-2|
b) 2 - |\(\frac{3}{2}x-\frac{1}{4}\)| = |\(-\frac{5}{4}\)|
c) |2x - 3| - |3x+2| = 0
d) |x - 2| + |x - 5| = 6
e) |x - 3| + |x + 5| = 8
1.Chứng minh rằng: \(\frac{3}{1^2.2^2}+\frac{5}{2^2.3^2}+\frac{7}{3^3.4^2}+...+\frac{19}{9^2.10^2}< 1\)
2.Chứng minh rằng: \(\frac{1}{3}+\frac{2}{3^2}+\frac{3}{3^3}+\frac{4}{3^4}+...+\frac{100}{3^{100}}< \frac{3}{4}\)
Làm nhanh giúp mình nhé mọi người !!!
Tính :
\(a,\left(\frac{4}{9}+\frac{1}{3}\right)^2\)
\(b,\left(\frac{1}{2}-\frac{3}{5}\right)^3\)
\(c,\left(\frac{-1}{5}\right)^5.\left(\frac{-6}{5}\right)^4\)
\(d,\left(\frac{3}{4}\right)^3:\left(\frac{3}{4}\right)^2:\left(\frac{-2}{5}\right)^3\)
Thực hiện phép tính
a)\(16\frac{2}{7}:\left(\frac{-3}{5}\right)+28\frac{2}{7}:\frac{3}{5}\)
b)\(\left(2^2:\frac{4}{3}-\frac{1}{2}\right).\frac{6}{5}-17\)
c)\(\left(\frac{1}{3}\right)^{50}.\left(-9\right)^{25}-\frac{2}{3}:4\)
d)\(\frac{3}{5}:\left(\frac{-1}{15}-\frac{1}{6}\right)+\frac{3}{5}:\left(\frac{-1}{3}-1\frac{1}{15}\right)\)
e)\(\left(-6,5\right).5,7+5,7.\left(-3,5\right)\)
hôm nay cô giáo giao nhìu bt quá mink k bk làm các bạn cố gắng giúp mink nhé///// mik cảm ơn nhìu !!@@
bài 1) tìm x;y;z biết :
a) \(\frac{x+1}{2}=\frac{y+3}{4}=\frac{z+5}{6};2x+3y+4z=9\)
b) \(\frac{x}{2}=\frac{y}{3},\frac{y}{2}=\frac{z}{5};x+y+z=50\)
c)2x+3y=-2z và 2x-3y+4z=48
d)\(\frac{1+3x}{12}=\frac{1+5x}{5y}=\frac{1+7x}{4y}\)
e) \(\frac{y+z+1}{x}=\frac{x+z+2}{y}=\frac{x+y-3}{z}=\frac{1}{x+y+z}\)
