Posted by Maxine on Wednesday, July 1, 2009 at 12:05pm.
Given that g(x)= 2x+1/5 and f(x)=x+4
Calculate the value of g(2)
2(2)+1/5= 3/5
Is this right??
How do i write an expression for gf(x) in the simpliest form??
And how do i find inverse functions such as g`1(x)?

math (reiny) got an ans but would like work it pl  bobpursley, Wednesday, July 1, 2009 at 1:19pm
No. 4+1/5= 3 4/5=3.8 or 19/5
Unless g(x)=(2x+1)/5 which in case then you would be right.

math (reiny) got an ans but would like work it pl  Reiny, Wednesday, July 1, 2009 at 1:21pm
I noticed that Marth already gave you an answer correctly following the order of operation the way you typed it.
You followed the same order in finding g(2) but made an arithmetic error.
g(2) = 2(2) + 1/5
= 4 + 1/5
= 19/5
Perhaps you meant
g(x) = (2x+1)/5
If so, follow Marth's steps using the corrected function for both g(f(x)) and the inverse of g(x)
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