Given that f (x) = x ^ 3-3x, the function y = f (x) is tangent through point P (- 2,2), then the tangent equation is

F (x) ´ = 3x & #710; 2-3, f (- 2) ´ = 9, the tangent equation is y = 9 (x + 2) + 2, and y = 9x + 20

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1. The tangent equation of F (x) = cosx at x = π / 6 and y = SiNx at a (π / 6,1 / 2) is I don't know much about it,
2. Let f (x) = 1 / 1 + SiNx, then its tangent equation at x = 0 is?
3. Let f (x) = XG (x), the tangent equation of curve y = g (x) at point (2, G (2)) be y = 1-x, then the tangent equation of curve y = f (x) at point (2, f (2)) is y = 1-x
4. Let the function f (x) = g (2x-1) + X, the tangent equation of the square curve y = g (x) at point (1, G (1)) be y = 2x + 1, then the tangent equation of the curve y = f (x) at point (1, f (1)) is y = 2x + 1 The tangent equation needs to be written in detail
5. Let f (x) = g (x) + X2, the tangent equation of the curve y = g (x) at point (1, G (1)) be y = 2x + 1, then the slope of the tangent of the curve y = f (x) at point (1, f (1)) is () A. 4B. -14C. 2D. -12
6. If f (x) - G (x) + X & sup2;, the tangent equation of curve Y-G (x) at point (1, G (1)) is y = 2x + 1 Let f (x) = g (x) + X2, the tangent equation of curve y = g (x) at point (1, G (1)) be y = 2x + 1, then the tangent equation of curve y = f (x) at point (1, f (1)) is y = 2x + 1-----
7. The tangent equation of the curve y = xex at x = 1 is___ ．
8. The tangent equation of curve y = xex + 2x + 1 at point (0,1) is () A. y=-3x+1B. y=3x+1C. y=2x+2D. y=-2x+2
9. The tangent equation of curve y = Xe ^ x + 2x + 1 at point (0,1) is
10. Find the tangent equation of the curve y = 4x-x ^ 2 at point B (1,3)
11. -The value of 2Ab × (the second power of a, B + the second power of 3AB - 1)
12. Four to the power of two thousand times one sixteenth to the power of one thousand is equal to? 4^2000×（1/16)^1000=
13. What are the single digits of the 999 power of 999 and the 2007 power of 2007
14. What is the single digit of 67 to the 999 power
15. What is the number at the end of 777 to the power of 777?
16. What is the mantissa of 777 times 888 times 999?
17. 777 power of 777 + 888 power of 888 + 999 power of 999 single digit?
18. Factorization: the second power of (A-2) - (2a-4)
19. If the solutions of the equations 2x + y = K + 1,3x-y = 3 about X, y are a pair of negative numbers, then the value range of K is?
20. On the system of equations 3x + YK + 1, x + 3Y = 3 of X, and X + y is nonnegative, what is the range of K?