CALCULUS: 3.4 Derivative
Part A-regarding sum and difference of functions :
SELF EXAMINATION : Question 8
Q.8) If y = 4x3 – 15x2 + 12x + 3 = 0; find the value of x for which dy/dx = 0.
for dy/dx = 0
12x2 - 30x + 12 = 0
6(2x2 - 5x + 2 ) = 0
2x2 - 5x + 2
2x2 - 4x - x + 2 = 0
2x(x-2) -(x-2) = 0
x-2 = OR 2x - 1 = 0
x = 2 OR x = ½