Question 712498
f(x) = (1/2)x


f(1) 
= (1/2)(1)   {substituted 1 for x}
= 1/2 {multiplied}


f(3)
= (1/2)(3) {substituted 3 for x}
= 3/2 {multiplied}


1/2 - 3/2 {value of f(1) - value of f(3)}
= -2/2 {subtracted numerators over common denominator}
= -1 {reduced}


f(1) - f(3) = -1
<br>For more help from me, visit: <a href = "http://www.algebrahouse.com/" target = "_blank">www.algebrahouse.com</a><br><br>