If n is an integer, f(n) = f(n-1) - n and f(4)=14. What is the value of f(6)?
Select the correct option.
A) 3	B) 0	C) 1	D) 2	E) 4
Since f(n)=f(n-1)-n then: f(6)=f(5)-6 and f(5)=f(4)-5.   As given that f(4)=14 then f(5)=14-5= 
<gadget id="calculator">14-5</gadget>
<output>9</output>
9 --&gt; substitute the value of f(5) back into the first equation: f(6)=f(5)-6=9-6= 
<gadget id="calculator">9-6</gadget>
<output>3</output>
3.   Answer: A.   Questions on funtions to practice:
<result>A</result>
If n is an integer, f(n) = f(n-1) - n and f(4)=14. What is the value of f(6)?