given that y =exinx/cosx where cos x = 0 has its turning point which satisfies the equation tanx=-1/xinx+b determine the exact values of a and b and hence verify that x coordinate of turning point is 2.122

Which equation represents the partial sum of the geometric series?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)