1 find the range of function y = 2x ^ 2 + 6x + 7 2 find the range of function y = 1 / X-2 3

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• 1. When is y = ax = B / CX = D equal to its inverse function If I do it right, I will add 100 Wrong, y = ax + B / CX + D
• 2. In the triangle ABC, ∠ a = 30 °, AC = 40, BC = 25, find AB (important process) I know the formula, but I don't know the operation of sin, Tan, con and so on. Do me a favor,
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• 5. If A-B = 10, what is the square of 1-A + B
• 6. As shown in the figure, in the triangle ABC, D is a point on the edge AB, and ad = AC, De is parallel to BC, CD bisection angle EDF
• 7. As shown in the figure, in △ ABC, the bisectors ad, be and CF of the three inner angles intersect at point I, IH ⊥ BC, to verify, ∠ bid = ∠ HIC
• 8. There are 38 greenhouses in the greenhouse vegetable base, which produce 76000kg vegetables in a month. How many kg vegetables are produced in each greenhouse in the first quarter?
• 9. If the cosine of their angle is the root of the equation 5x2-7x-6 = 0, then the length of the other side of the triangle is () A. 52B. 213C. 16D. 4
• 10. On the practical significance of Maslow's hierarchy of needs theory in the practice of enterprise management
• 11. Given the function f (x) = ax & # 178; + 1 (a > 0), G (x) = x ^ 3 + BX (1) If the curve y = f (x) and the curve y = g (x) have a common tangent at their intersection (1, c), the values of a and B are obtained; (2) When a ^ 2 = 4b, find the monotone interval of F (x) + G (x) - and its maximum value in the interval (- ∞, - 1)
• 12. 1. Two numbers with the same absolute value are opposite to each other with different symbols, and one of them is called the opposite number of (). 2 1. Two numbers with the same absolute value are opposite to each other with different symbols, one of which is called the opposite number of (). 2. The opposite number of a number can be preceded by a () sign
• 13. What's the difference between the result of his calculation and the correct answer? What's the difference between the result of his calculation and the correct answer? What's the difference between the result of his calculation and the correct answer when he miscalculated 17 * (M + 0.3) into 17 * m + 0.3? What's the difference between the result of his calculation and the correct answer when he miscalculated 17 * (M + 0.3) into 17 * m + 0.3? What's the difference between the result of his calculation and the correct answer when he miscalculated 17 * (M + 0.3) into 17 * m + 0.3? What's the difference between the result of his calculation and the correct answer when he miscalculated 17 * (M + 0.3) into 17 * m + 0.3, What is the difference between his calculation result and the correct answer? What is the difference between his calculation result and the correct answer?
• 14. Addition and subtraction of rational numbers in the first semester of junior high school This is the second sub problem of the seventh question on page seven of the exercise book of rational number addition and subtraction in the first semester of this year!
• 15. In the football round robin, if the red team wins the yellow team by 4:1, the yellow team wins the blue team by 1:0, and the blue team wins the red team by 1:0, then the net winning goals of the red team, the yellow team and the blue team are () A. 2，-2，0B. 4，2，1C. 3，-2，0D. 4，-2，1
• 16. Rational number addition and subtraction in junior high school (addition) （-25）+34+156+（-65）=100 （-64）+17+（-23）+68=（-2） （-42）+57+（-84）+（-23）=（-92） subtraction （-3）-（-7）=10 （-10）-3=（-13） 33-（-27）=60 Are these questions right? Addition of rational numbers is the addition of different numbers, the decrease of sign follows the decrease of sign. Subtraction is the opposite of subtracting a number equal to the addition of this number
• 17. 50 rational number addition and subtraction mixed operation problem + + to answer! Urgent
• 18. How to calculate the mixed operation of addition and subtraction of rational numbers? Example: 2 1 — + （— —）— 1 + — 3 5 3
• 19. The general steps of the mixed operation of addition and subtraction of rational numbers are: (1)________ ;(2)_________ ;(3)________ _______ ;(4)__________________
• 20. Steps of rational addition and subtraction?