Note that the domain of function y = √ 1-lg (x-1) is set a, and the domain of function y = √ 3 * 3-x-3 is set B. find a ∩ B
1-lg (x-1) > = 0 X-1 > 0 3 * 3-x-3 > = 0 find the solution of these three inequalities, and then find the intersection
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- 1. The volume of a cylinder is 157 cubic centimeter. The area of the base of a cone is 6.28 square centimeter, and the height of a cone is () centimeter
- 2. A triangle is 150 meters long at the bottom, and the ratio of the bottom to the height is 6:5. How many square meters is the area of the triangle?
- 3. Only two of the prime numbers are even, and the rest are odd nothing
- 4. The bottom of a triangle warning sign is 1.8 meters and the height is 1.5 meters. What's the area of this warning sign?
- 5. It is known that, as shown in the figure, CD is the tangent of ⊙ o, C is the tangent point, and the extension line of diameter AB intersects CD at D, connecting OC and BC. (1) write three different types of conclusions; (2) if BD = ob, prove: CA = CD
- 6. As shown in the figure, P is in ∠ AOB, and points m and N are the symmetrical points of point P about OA and ob respectively. If Mn = 10cm, calculate the perimeter of triangle PEF
- 7. In the parallelogram ABCD, ∠ Abe = ∠ CDF, it is proved that the quadrilateral BEDF is a parallelogram
- 8. Shanghai high school mathematics other inequality solution problem set in turn recorded as a and B, the value range of the real number The solution sets of inequality │ X - (a + 1) & sup2 / 2 │≤ (A-1) & sup2 / 2 and X & sup2; - 3 (a + 1) x + 2 (3a + 1) ≤ 0 are denoted as a and B in turn, so that a is included in the value range of real number a of B
- 9. Let P1 [2,3] P2 [- 1,4] and the extension line of P on p1p2 be the | vector p1p | = 2 | vector PP2 |
- 10. If x and y are opposite to each other, then x + 2y-4 = 0=______ ,y=______ .
- 11. (a+b)(a2-ab+b2)-(a+b)2 (a + b) (a ^ 2-AB + B62) - (a + b) ^ 2 to simplify this formula, the answer is - 3A ^ 2b-3ab ^ 2, but how do you get it,
- 12. It is known that ABC, ad and be are the heights of BC and AC sides respectively, the extension lines of EB and ad intersect at h, and AC = BH. Please prove that ad = BD
- 13. The ratio of 5:12 to 20
- 14. The area of a circle is 6.28 square meters, and its circumference is 6.28 square meters
- 15. Is it true that the square of x plus one is greater than or equal to zero? 1: X is equal to any number. 2: according to the steps of solving the problem, the equation does not hold
- 16. In triangle ABC, if a = 9, B = 10, C = 12, then the shape of triangle ABC is? Ask the people who will teach... Be grateful
- 17. 998 of 999 + 665 of 666 + 332 of 333-110 of 111
- 18. A cuboid reservoir is 8.5m long, 4m wide and 1.5m deep. What is the area of the reservoir?
- 19. Jiangsu Education Press sixth grade volume I mathematics supplementary exercise on a problem, online and so on The last question on page 47 of the supplementary exercises of mathematics in Volume 1 of grade 6 of Jiangsu Education Press, to calculate the formula, thank you. In addition, there are () expectation and () fight, please answer There is a two digit number. The number in one digit is two thirds of the number in ten digit. If you subtract three from a number in ten, it is equal to a number in one. What's the two digit number
- 20. Please use the substitution elimination method and the addition and subtraction elimination method to solve the equations respectively {2x+y=7 x+2y=8