What is the y-coordinate minimum point of y = 3x^2 + x - 4

if y=3x^2 + x -4 

then 

dy/dx = 6x + 1

setting this equal to zero gives

6x + 1 = 0

so then

x = -1/6

putting this x value back into the original equation gives

y = -49/12

MW

Related Maths A Level answers

All answers ▸

The quadratic equation 2x^2 + 8x + 1 = 0 has roots x1 and x2. Write down the value of x1+x2 and x1*x2 and find the value of x1^2 + x2^2


A car is travelling with a velocity of "0.5t^2+t+2" m/s at t=0 (where t is in seconds), find the acceleration of the car at a) t=0 b)t=2


What are the different steps involved in Proof by Induction?


Simplify √32+√18 to a*√2 where a is an integer