3 . 52 - 27 : 32 + 52 . 4 - 18 : 32
= 3 . 25 - 27 : 9 + 25 . 4 - 18 : 9
= 75 - 3 + 100 - 2
= 170
3 . 52 - 27 : 32 + 52 . 4 - 18 : 32
= 3 . 25 - 27 : 9 + 25 . 4 - 18 : 9
= 75 - 3 + 100 - 2
= 170
3x5^2-27:3^2+5^2x4-18:3^2
giúp mik với .mình cần gấp bây giờ
a)3x5^2-27:3^2-5^2x4-18:3^2
b)2x -1 là bội của x-3
c)205-[ 1200-(4^2 - 2x3)^3] :40
Câu 1:
A= 2^2/1x3+3^2/2x4+4^2/3x5+...+99^2/98x100
a) 1/1x3 + 1/3x5 + 1/5x7 +...+ 1/2007x2009
b) 3^2/20x23 + 3^2/23x26 +...+ 3^2/77x80
c) 4/2x4 + 4/4x6 + 4/4x8 +...+ 4/2008x2010
d) 1/18 + 1/54 + 1/108 +...+ 1/990
e) B= 1 + 3 +3^2 +...+ 3^100
f) A= 2^0 + 2^1 + 2^2 +...+ 2^2010
g) S= 1 + 2 + 2^2 + 2^3 +...+ 2^2008 / 1 - 2^2009
1/2x(2/9+3/7-5/27)/1/3x5/7-1/27
3/2x4/3x5/4x...2022/2022
tính:
a) \(\frac{1^2}{1x2}+\frac{2^2}{2x3}+\frac{3^2}{3x4}+...+\frac{100^2}{100x101}\)
b) \(\frac{2^2}{1x3}+\frac{3^2}{2x4}+\frac{4^2}{3x5}+...+\frac{59^2}{58x60}\)
7^9:7^7-3^2+2^3x5^2 = ????
23.75+25.23=????
-27-15=????
|-5|+(-21)=???
Tìm X
x+3=2^3:2
-x+12=-5
câu 1: tính nhanh
A= 2^2/1x3 x 3^2/2x4 x 4^2 /3x5 x.....x 999^2/998x1000
câu 2: chứng minh
S= 1/101 + 1/102 + 1/103 +....+ 1/200 > 1/2