If #f(x)= 2x+1#, what is #f(x+2)?

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Answer 1 · 2015-05-25T21:29:02

Simle. You substitute #x# for #x+2#:

#f(x+2)=2(x+2)+1#
#f(x+2)=2x+4+1#
#f(x+2)=2x+5#

You do the same as you'd do if it was asking the value for your function when #x# equals some number. For example, what's #f(3)# in this case?

#f(3)=2(3)+1=7#

And f(0)?

#f(0)=2(0)+1=1#

:)