Question

i have a question
can someone will help me with my calculus and vectors assignment

Answer 1

if you post the actual information we might be able to determine if we can or cannot ....

Answer 2

find f^(3) (x) if f(x) = 1/sqrt(3X + 4)

Answer 3

the third derivative of that function right?

Answer 4

yes

Answer 5

id rewrite it as:\[(3x+4)^{-1/2}\]
and work it from that angle

Answer 6

but how i can solve it

Answer 7

the derivative rules are pretty much basic and self explanatory. If you do not yet know them then it might be good for you to revisit them.

Answer 8

\[\frac{d}{dx}x^n=nx^{n-1}\]
\[\frac{d}{dx}f(g(x))=f'(g(x))*g'(x)\]
\[\frac{d}{dx}fg=f'g+fg'\]
those look like the 3 that you might want to apply to this

Answer 9

ok

Answer 10

thanx

Answer 11

find the equations of the tangents to the curves f(x) = x^2/3 and g(x)=9/x at their point of intersection.

Answer 12

an equation of a tangent line needs a point and a slope to be defined.

since slope IS derivative we would need to determine the derivative of each function.

Answer 13

then we would need to determine the point at which they actually intersect to define the "point"

Answer 14

y = f'(xo)x -f'(xo)xo + yo

y = g'(xo)x -g'(xo)xo + yo

given the point of intersection as (xo,yo)

Answer 15

a ball is thrown upward and forward so that after time t (in seconds) its height is
h(t) = 20t-5t^2. After starting to descent it strikes a wall at a point 15m high. find the rate of descent or downward velocity of the ball at the moment of impact against the wall.

Answer 16

new questions should be posted on the left in order to allow more people to have an opportunity to respond to them.

Answer 17

oh...sorry...i didn't know that