Please help I WILL GIVE BRAINLIEST AND 25 POINTS Write the series using summation notation.

4. - 10 + 2 + 14 + 26 + 38 + 50 + 62 + 74

5. 6+13+32+69+

6. - 5/8 + 10/11 + 20/16 + 40/23

true

step-by-step explanation:

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.

the answer is a.

135 and 80

step-by-step explanation:

what are the