How many kinds of words can be divided?

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1. Observe the following formulas: 3 ^ 1 = 3, 3 ^ 2 = 9, 3 ^ 3 = 27, 3 ^ 4 = 81, 3 ^ 5 = 243, 3 ^ 6 = 729 (1) Do you find any regularity in their single digit numbers? (2) What is the number of 3 ^ 2007 based on your findings
2. Given that ABCD is not equal to each other, and a * b * c * d = 9, then what is a + B + C + D equal to Given 0 < B < 1, what is the absolute value of B-1 plus the absolute value of B
3. We know that the product of four integers ABCD = 25, and a
4. Given that four integers a, B, C and D are not equal to each other, and ABCD = 25, find the value of a + B + C + D
5. Given that a, B, C and D are mutually unequal integers, and ABCD = 9, then the value of a + B + C + D is equal to () A. 0b. 4C. 8D
6. Given that a, B, C and D are mutually unequal integers, and ABCD = 9, then the value of a + B + C + D is equal to () A. 0b. 4C. 8D
7. It is known that the bottom surface of an equilateral triangular pyramid is an equilateral triangle with side length of 1, and its front view and top view are as shown in the figure, then the area of its side view is___ ．
8. As shown in the figure, the side edge length of a straight triangular pyramid is 2, the bottom is an equilateral triangle with side length of 2, and the front view is a square with side length of 2. Calculate the area of its left view Very anxious! Why is the width the height on the side of the bottom regular triangle
9. Let s-abcd be a pyramid whose side area is twice the area of its bottom, whose height so is equal to 3, and whose sphere is the whole area of the pyramid
10. If the side length of a hexagonal prism is 3cm and the side length is 5cm, the area of its side unfolded view is () cm
11. 833 - (218 + 233) simple operation It's due tomorrow!
12. There are 1500 literature and art books in the library, 30 less than 3 times of science and technology books. How many science and technology books are there?
13. Math score, 24 and 3 of 11-15 + 6 and 6 of 1 To calculate the process
14. My mother said to Xiao Ming, "I'll go to the unit for a meeting this afternoon, and I won't pick you up after school."?
15. When x=______ F (x) = (x-a1) 2 + (x-a2) 2 + +(x-am) 2 is the minimum
16. I go to the library every day
17. 1+2-3-4+5+6-7-8+9+10-11-12······-2003-2004+2005+2006-2007-2008+2009+2010=?
18. The formula of mathematics practical problems in grade six
19. A square with a side length of 4 decimeters, take one side of it as the axis, and rotate the square for one circle to get a square______ What is the volume of this body______ Cubic decimeter
20. Any function f (x) defined on R can be expressed as the sum of an odd function g (x) and an even function H (x), X belongs to R, then, A,g（x）=x,h（x）=lg(10^x+10^-x+2) B,g(x)=1/2lg(10^x+1+x),h(x)=1/2lg(10^x+1+x) c,g(x)=1/2x,h(x)=lg(10^x+1)-x/2 D,g(x)=-1/2x,h(x)=lg(10^x+1)+x/2 Why not D