If f (x) is an odd function defined on R and its minimum positive period is 2, then f (1) + F (2) + F (3) F (2004) + F (2005) equals ()

If f (x) is an odd function defined on R and its minimum positive period is 2, then f (1) + F (2) + F (3) F (2004) + F (2005) equals ()

If it is defined on R, if it is an odd function, it must be symmetric about the origin, so f (0) = 0, so the function value of all even independent variables is 0, and there are f (- 1) + F (1) = 0 (definition of odd function), f (- 1) = f (- 1 + 2) = f (1), so f (1) = 0, period is 2, and the function value of many odd independent variables is 0, so the answer is 0

1+(-2)+3+(-4)+5+(-6)+… +2003 + (- 2014)
PEP 7 grade rational number which unit!

1+(-2)+3+(-4)+5+(-6)+····+（+2013）+（-2014）
=[1+(-2)]+[3+(-4)]+[5+(-6)]+····+[（+2013）+（-2014）]
=-2014÷2
=-1007
It's a chapter, not a unit. Chapter one

Divide a number by a fraction
4/5,2/5,1/5,（ ）,1/20,
1/2,3/4,9/8,27/16,（ ),（

4/5,2/5,1/5,（ 1/10 ）,1/20,（ 1/40 ）?
Each term is multiplied by 1 / 2 of the previous term
1/2,3/4,9/8,27/16,（ 81/32 ),（ 243/64 ）?
Each term is the previous term multiplied by 3 / 2

(1) Write out the parameter equation of the straight line passing through the point m (1,5) with an inclination angle of π / 3; (2) use the parameter equation in (1) to find the distance from the intersection of the straight line and the straight line x-y-2 √ 3 = 0 to the point m; (3) find the sum and product of the distance from the two intersections of the straight line and the circle X & # 178; + Y & # 178; = 16 to the point M

Solution equation: 8 / 5x-10 = 2 / 25

8 / 5x-10 = 2 / 25 double 25
40x-250=2
40x=250+2
40x=252
x=6.3

If M = {0, 1, 2}, n = {(x, y) | x-2y + 1 ≥ 0 and x-2y-1 ≤ 0, x, y ∈ m}, then the number of elements in n is______ ．

Draw the feasible region represented by the set n = {(x, y) | x-2y + 1 ≥ 0 and x-2y-1 ≤ 0, x, y ∈ m}, as shown in the figure. From the meaning of the question, we can see that there are only four points (0,0), (1,0), (1,1) and (2,1) in n that satisfy the condition, so the answer is: 4

Simple calculation of 9 / 10 of 11 × 10

11×9/10
=（10+1）×9/10
=10×9/10+1×9/10
=9+9/10
=9 and 9 / 10

On the number axis, if M and N represent the numbers m and N respectively, the distance between them can be expressed as Mn = ()

| m-n |

Half (x minus 1) equals one fifth (x plus 2). What's the answer?

Hello: one half (x minus 1) equals one fifth (x plus 2) 0.5x-0.5 = 0.2x + 0.40.5x-0.2x = 0.5 + 0.40.3x = 0.9x = 3 ~ if you agree with my answer, please click the [adopt as satisfactory answer] button in time ~ ~ the mobile phone questioner can click [satisfied] in the upper right corner of the client

It is known that the function f (x) is a Zeng function in the domain (- 2,2), and f (2 + a) > F (2a-1) is used to find the value range of real number a

Firstly, it meets the requirements of domain
-2