Posted by **Mary** on Sunday, February 19, 2012 at 12:58pm.

Find any critical numbers of the function. (Enter your answers as a comma-separated list.)

g(t) = t sqrt6 − t , t < 13/3

I don't even know how to start out!

- Calculas -
**Reiny**, Sunday, February 19, 2012 at 2:18pm
I will assume you meant

g(t) = t √(6-t) = t(6-t)^(1/2)

g'(t) = t (1/2)(6-t)^(-1/2) (-1) + (6-t)^(1/2) using the product rule

= 3)t-4)/(2√(6-t) )

=0 for any max/min values of the function

t/(2(6-t)^(1/2) = (6-t)^(1/2)

t = 2(6-t)

t = 12 - 2t

3t = 12

t = 4

so g(4) = 4√(6-4) = 4√2

to see if there are any points of inflection

differentiate 3(t-4)/(2√(6-t) ) , set that result equal to zero and solve for t

(hint: there are no points of intersection)

You should get a second derivative of 3(t-8)/(4(6-t)^(3/2 )

which when you set equal to zero will give an answer of

t = 8

BUT, t=8 is outside the domain of our function, so ... No Solution.

y-intercepts ? , let t =0

y = 0√6 = 0 , the origin (0,0)

any t-intercepts?

t(6-t)^(1/2) = 0

t = 0 or t = 6

look at the graph .....

http://www.wolframalpha.com/input/?i=t%286-t%29%5E%281%2F2%29

ignore the imaginary part of the graph (the red line)

the point (4,4√2) is a maximum point

## Answer this Question

## Related Questions

- Math - Find the critical numbers of the function. (Enter your answers as a comma...
- Calculus - Find the critical numbers of the function. (Enter your answers as a ...
- Math - Find any critical numbers of the function. (Enter your answers as a comma...
- pre-calculas - Find the slant asymptote, if any, of the rational function. Do ...
- calculus - Find any critical numbers of the function. (Enter your answers as a ...
- Business - Given y = 4x3 − 48x2 + 5. (a) Find the critical values of the ...
- help ? - Let f(x) = (x − 3)^−2.Find all values of c in (1, 4) such ...
- calculus - Let f(x) = (x − 3)−2. Find all values of c in (2, 5) such...
- calc - Verify that the function satisfies the three hypotheses of Rolle's ...
- Math Problem (please help) - Find all the zeros of the function. (Enter your ...

More Related Questions