A club has 1500 candy bars to sell for a fundraiser. Every week, 20% of the candy bars were sold. Which recursive function best represents the number of candy bars left to sell f(n) after n weeks? A. f(n) = 1500 - 0.8 x f(n - 1) , f(0) = 1500 , n > 0
B. f(n) = 0.2 x f(n - 1) , f(0) = 1500 , n > 0
C. f(n) = 0.8 x f(n - 1) , f(0) = 1500 , n > 0
D. f(n) = 1500 - 0.2 x f(n - 1) , f(0) =1500 , n > 0

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

one set of data has more variation than the other. hope this !