Simple operation: 8 / 9 * [3 / 4 - (7 / 16-0.25)]?

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• 1. 8/3*5+8/5*7+8/7*9+8/9*11…… +Simple calculation of 8 / 23 * 25
• 2. 8/3*5+8/5*7+8/7*9+8/9*11…… +8 / 23 * 25 simple calculation, simple answer, points Oh
• 3. (3.75 + 4.1 + 2.25) × 9.8
• 4. Simple calculation! 1.2.5 × 9.82.1.25 × 25 × 3.2 3.2.4-1.375 + 3 / 5, 4.3 / 1 △ 3 / 7 × 5 / 14
• 5. 125-2 and 1 / 4-
• 6. Simple calculation of 12.71-4.85 + 3.29-1.15
• 7. Simple calculation of 1.29 + 3.7 + 0.71 + 6.3
• 8. Simple operation: 7.29-2.71 square, 2.8 × 8 + 7.6 × 8-0.4 × 8
• 9. What operation law does 25 * 39 + 25 = 25 * (39 + 1) use?
• 10. According to the law of n (n + 1), the value of 100 + 102 + 104 + 106 +.. + 998 + 1000 is calculated,
• 11. On the inequality system 1 ≤ X & # 178; + X + K ≤ 2 of X, then the value of K is?
• 12. If the solution set of the system of inequalities x-3 ″ a, b-X ″ - 2 about X is x = 2B + A + 1, find the system of inequalities x-k ″ a, x + K
• 13. Given the function y = x (x-1) &# 178; (x + 3) &# 179;, find y ^ (6)
• 14. The factor is divided into 16-8 (X-Y) + (X-Y) 2 =___ ．
• 15. Decompose the factor to find the complete point 1. Y & # 178; - 9 (x + y) & # 178; 2. (x + y) & # 178; - 16 (X-Y) & # 178; A & # 178; B & # 178; - 0.01 X & # 178; y-2xy & # 178; + y cubic 16 - (2a + 3b) &# 178; (A & # 178; + 4) &# 178; - 16A & # 178; a & # 178; (a-b) &# 178; - B & # 178; (a + b) &# 178;
• 16. (x + y) & #178; + (x + y) + quarter
• 17. To make the equation x (AX & # 179; + X & # 178; + b) + 3x-2c = x & # 179; + 5x + 4 hold, find the values of a, B and C Seeking process
• 18. The prescriptive sign "∥" denotes an operation, that is, a ∥ B = √ AB + A + B (a, B ∈ R). If 1 ∥ k = 3 (1) Find the value of K; (2) Find the range of function ∫ (x) = k ∫ X
• 19. 7/x²+1/x²-x=0
• 20. (x+1)²+x