suppose f(x)=x^3+1. find the graph of f(2x)

Question

anonymous · Answer

i don't understand it at all

usukidoll · Answer

we are given the function
$$f(x) =x^3+1 $$
that should be graphed first
and then we apply the f(2x) in this case x = [2x] into the original function and that modification should be graphed second.

arindameducationusc · Answer

I agree with @UsukiDoll

usukidoll · Answer

:) thank you @arindameducationusc

welshfella · Answer

the graph will be a stretch of factor 2 of f(x) parallel to the y-axis.

anonymous · Answer

attachment

welshfella · Answer

which one  has that stretch?

anonymous · Answer

i think the third down

arindameducationusc · Answer

This should help for more....

welshfella · Answer

well its not easy to see unless you have the graph of x^3 + 1 also

anonymous · Answer

true

welshfella · Answer

ff(2x) will bring the graph closer to the y-axis.  It will still go through the point (0,1)

welshfella · Answer

i think its B

welshfella · Answer

- but  you really need to draw them to make sure

usukidoll · Answer

graph f(x) = x^3+1 
and then apply the f(2x)
your modified function should look like this
f(2x)=8x^3+1

welshfella · Answer

yes

welshfella · Answer

to see the graphs go the desmos calculator web site

welshfella · Answer

very roughly the graphs are
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