 Final test of the 10th Grade Good luck!Question 1 The equation has : no solution 1 solution, x = 2 2 solutions, x = 0 et x = 4Question 2How much is ? 0  Question 3What is the derivative of the function 2  Question 4Why is the function always decreasing ? Car sa derivée est toujours positive Car sa derivée est toujours négative Car elle est toujours positiveQuestion 5How much is the sum of all the whole numbers from 1 to 1000 ? 500000 500500 555555Question 6You play heads or tails with a coin. If the coin falls on tails you earn 10 euros, if it falls on heads you earn 9 euros. X is the random variable that shows the winning after you've tossed the coin. How much is X expected value ?   Question 7The barycenter of the system is situated : Dans le triangle ABC A l'extérieur du triangle, du coté de la droite (BC) A l'extérieur du triangle, du coté de la droite (AB)Question 8How much is the dot product of and of ? 13 23 43Question 9The image M' of a point M by the homotethy which center is O and ratio -2 : is on the half line [OM) is on the segment [OM] is on the line (OM).Question 10The cartesian coordinates of a point M are . What are its polar coordinates?    