The - 3 power of 2 × 10 is equal to

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• 1. 1^3+2^3+3^3+… +What is (n-1) ^ 3 + n ^ 3 equal to?
• 2. +2! + 3! 3 / 2 +2! + 3! 3 / 3 Plus + 3! + 4! 4 / 4 plus 3! + 4! + 5! 5 / 5 Plus + (n + 1)! + (n + 2)! Sum of 1 / 1
• 3. To solve the equations: {2a-b = - 3,2b-a = 3 2a-b=-3 2b-a=3
• 4. >What is the number in front of the multiplication sign in the multiplication formula_ Teaching design of the meaning of multiplication and the law of operation
• 5. 1 / 1 + 2 + 1 / 1 + 2 + 3 + 1 / 1 + 2 + 3 + 4 + +1/1+2+3+…… +20 = m / N. where m and N are positive integers and have no common divisor. Find m + n
• 6. If x = 1 is a solution of the quadratic equation AX2 + bx-40 = 0 and a ≠ B, then the value of A2 − b22a − 2b is______ ．
• 7. Given that the two points of equation 2x-5x-7 = 0 are - 1,7 / 2, then the distance between the image of quadratic function y = 2x-5x-7 and the two intersections of X axis is
• 8. Using C + + to calculate the approximate value of definite integral function requirements: 1) the left and right end points of the input interval; 2) using rectangular method and parabolic method to calculate the definite product of user-defined function Using C + + to find the approximate value of F (x) = x * x - 2 * x - 1 by rectangle method and parabola method, and using C + + to find the approximate value of definite integral
• 9. The focus of the ellipse is f1.f2, and there is a point P on the ellipse, so that the angle f1pf2 is equal to 120 degrees, then the value range of eccentricity e of the ellipse is? Answer The focus of the ellipse is f1.f2, and there is a point P on the ellipse, so that the angle f1pf2 is equal to 120 degrees, then the value range of eccentricity e of the ellipse is? The answer is [root 2 / 3.1]
• 10. Find the equation that passes through the intersection of the straight line / 1:2x + 3y-5 = 0, / 2:3x-2y-3 = 0, with an inclination angle of 45 degrees!
• 11. Write the formula of the result is 24 with four numbers 5,7,7,11 and +, -, *, /, and brackets No, as long as it works
• 12. Use "add, subtract, multiply and divide" to connect 1, 5, 5 and 5 so that the formula is equal to 24 A mathematical thinking problem, will reward!
• 13. Observe the numbers 3, 3, 8 and 8. If you don't change the numbers smoothly, add the operation symbols and form a formula to make the result equal to 27
• 14. Observe the group of numbers 3 ~ 8, do not change the order of the numbers, add the operation symbols, and make these numbers into a formula, so that the result is equal to 27
• 15. It is only allowed to add two '-', one '+' and one bracket. It does not change the order of the numbers, and connects the nine numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 The formula of the result is 100: 1 23 4 5 6 7 8 9 = 100 fast
• 16. With a "+" two "-" and a bracket, and without changing the numerical order, connect the nine numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 into the formula with the result of 100
• 17. -What is 1 / 3 + 3 / 4-5 / 6 + 1 / 2?
• 18. 9 11 2 3 how to use addition and subtraction to divide four numbers is equal to 24
• 19. How do four numbers 1, 3, 5 and 9 equal to 24?
• 20. The sum of a two digit one digit number and a ten digit number is greater than 10. If 36 is added to the two digits, it is exactly equal to the two digits after the exchange of two digits Find the original two digits, using inequality solution