Question

find the absolute minimum point for the graph of f(x)=x^4+3x^3+x^2-1

Answer 1

This is a question testing on the chapter Differentiation
let f(x) = y
Y= x^4 + 3x^3 + x^2 -1
DY/DX = 4x^3 + 9x^2 + 2x
For turning pt so called min/max pt,
DY/DX = O
4x^3 + 9x^2 + 2x = o
x(4x^2 + 9x + 2) = o
Find the coordinates of x and sub it into the first y equation at the above. They are the coordinates of the min pt.

Answer 2

i dont know how to do that cause when my teacher taught it i was out on maternity leave

Answer 3

Now that you saw the solution to the question, you should memorise it as this is not a topic about understanding. Hope it helps you :)

Answer 4

it doesnt but thanks for trying