13. {0.24/1 Points] DETAILS PREVIOUS ANSWERS LARHSCALCZ 1.AP.01 1. The position function s(t) = 4.9t2 + 396.9 gives the height (in meters) of an object that has fallen from a height of 396.9 meters after t seconds. MY NOTES PRACTICE ANOTHER (a) Explain why there must exist at a time t, 1 3 t-3 \"m (4.9:2 + 396.9) [4.9( )2 + 396.9] X43 t 3 2 = \"m ( )t + 4.9( ) X->3 t 3 2 = \"m -4... :1) X43 t 3 = "m -( )(f - 3)(f + ) X->3 t 3 ---Select--- v V right before it hits the ground. It can be improved 11. [0/1 Points] DETAILS PREVIOUS ANSWERS LARHSCALC2 1.AP.014. MY NOTES PRACTICE ANOTHER Let f be a function defined by the following. f ( x ) = e 7x XSO 6 - 5 cos(x), x > 0 (a) Find lim f(x). X->-1 X (b) Show that f is continuous at x = 0. lim f(x) x - 0 lim f(x) f(0) = (c) Find lim f(x). X-> -00