What are the rules of using leverage

Power arm x power = resistance arm x resistance

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4. It is known that a, B and C are not collinear, and a point m outside the plane ABC satisfies the vector om = 1 / 3 vector OA + 1 / 3 vector ob + 1 / 3 vector OC It is known that a, B and C are not collinear, and a point m outside the plane ABC satisfies the vector om = 1 / 3 vector OA + 1 / 3 vector ob + 1 / 3 vector OC (1) Judge whether the three vectors Ma, MB and MC are coplanar; (2) Judge whether point m is in plane ABC
5. Two numbers are composite numbers, their greatest common factor is 1, and their least common multiple is 36. What are these two numbers? What is the minimum number of 1 after a number is divided by 3, 5, and 7? Come on, come on, come on
6. As shown in the figure, in the diamond ABCD, ∠ ABC = 60 ° de ‖ AC intersects the extension line of BC at point E
7. They are 45 and 27 respectively. What are the greatest common divisor and the least common multiple?
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9. My favourite fruit is apple. Is this sentence right? Apple plus s? Is it synonymous with I like apple best. Or apples?
10. The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3 The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3
11. (1) When the equation 2x + M = 3 and x-one-third = one-third m of X have equal solutions, how to find the value of M? (2) When m is a value, the solution of the equation 5x + 4m = two-thirds + X is 3 less than that of X (M + 2) = m (x + 2) (3) When m is an integer, the solution of the equation 2mx = (M + 1) x + 6 is a positive integer
12. Given that x = 1 is the solution of the equation 2-third (M + x) = 2x, then the solution of the equation m (x-3) - 2 = m (2x-5) about X is x =?
13. Given that equation 2x + 7 = - 3 has the same solution as equation 2-3 / 3m-x = 0, find M
14. Equation 2 - (2x-3 / 4) = X-6 / 7, get () A、2-2(2x-4)=-(x-7) B、12-2(2x-4)=-12x C、12-2(2x-4)=-(x-7) D、12-(2x-4)=-(x-7)
15. How to solve this equation
16. Solving the equation 2 out of 5 plus 3 out of 5 equals 1
17. How to solve the equation that 2x-1 / 3 equals 5 / 6?
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