103+2.53+53:55
= 1000+2.125+125:55
= 1000+250+25/11
= \(1252\frac{3}{11}\)
103+2.53+53:55
= 1000+2.125+125:55
= 1000+250+25/11
= \(1252\frac{3}{11}\)
Tìm x biết x=10^2.5^3.15^6 / 3^6.5^10
Tính A=\(\left(\frac{1.5+1-0.75}{2.5+\frac{5}{3}-1.25}+\frac{0.375-0.3+\frac{3}{11}+\frac{3}{12}}{-0.625+0.5-\frac{5}{11}-\frac{5}{12}}\right):\frac{1890}{2005}+115\)
Giúp mk vs nka
C =1.4 + 2.5+3.6+4.7+…..+n(n + 3)
D =12+22+32+......+n2
Sử dụng tính chất phân phối để điền vào chỗ trống
3(x +) =....
(2+x)5=...
3.4+4x =.......
2x + 2.5 =....
4(x-2) =.......
2x-2.4 =......
tính
a,[-5/8+(-3/4)]+15/6 b, 1/2-(3/4+-5/6)-7/12 c, 17/2-(-3/7+5/3) d,-3-2/3+[-10/9-25/3)-5/6
tính
a,[-5/8+(-3/4)]+15/6 b, 1/2-(3/4+-5/6)-7/12 c, 17/2-(-3/7+5/3) d,-3-2/3+[-10/9-25/3)-5/6
Câu 1: Cho x=12,30(3), khi đó
A.xϵN
B.xϵZ
C.xϵQ
D.xϵi
Câu 2: Cho x=0,557766578...,khi đó
A.xϵN
B.xϵZ
C.xϵQ
D.xϵi
Câu 3: ta có:b(55)3, khi đó b=
A.58
B.515
C.52
D.5125
Tính:
a) 43 . 53 e) 52 . 62. 32
b)63 . 53 f) \(\dfrac{45^{10^{ }}.5^{10}}{75^{10}}\)
c)82 . 52 i)\(\dfrac{\left(0,8\right)^5}{\left(0,4\right)^6}\)
d) 1253 . 83 h) \(\dfrac{2^{15}.9^4}{6^6.8^3}\)
g)\(\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
Tính
a. \(\frac{\left(13\frac{1}{4}-2\frac{5}{7}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)