Find the domain and range of the function. Use interval notation for result.
f(x) = 7x3 + 8x2 − 6

Question

Find the domain and range of the function. Use interval notation for result.
f(x) = 7x3 + 8x2 − 6

triciaal · Answer

suggest graphing 
When x = 0 what is y? = -6
when y =  0  then 7x^3 + 8x^2 - 6 = 0
solve for x
set up a table with values of x and find y value

anonymous · Answer

I'm not sure what I'm looking at on the graph, it doesn't cross the y axis

triciaal · Answer

i just lost the table !
can you post what you have?

anonymous · Answer

Argh, I have x=0 as y=-6, x=1, y=9, x=2 as y=82

triciaal · Answer

the question said to write the domain and range 

example you said it doesn't cross the y-axis then you would say 
wait when x = 0 y= -6

triciaal · Answer

it had -189 to 15

anonymous · Answer

i take that back it does cross the y axis.. depends on the window i have opened on it, this stuff is so confusing for me. I'm taking it online and there is not much explanation on this section

triciaal · Answer

have to see the table 
i was doing values of x  from -3 to 3

triciaal · Answer

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