Question 1209310
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w = sqrt(2x-1)
f(w) = (1/w)^2
f(2) = (1/2)^2
f(2) = <font color=red>1/4</font>



Or,
sqrt(2x-1) = 2
2x-1 = 2^2
2x-1 = 4
2x = 5
x = 5/2 = 2.5
Then,
f( sqrt(2x-1) ) = 1/(2x-1)
f( sqrt(2*2.5-1) ) = 1/(2*2.5-1)
f(2) = <font color=red>1/4</font>
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