If a, b, c are in A. P., and a², b²,c² are in H. P. (a ≠ b ≠ c) then: (A) a 2b, c are in G. P
(B) a, b, care in H. P
(C) a, b, -c/2 are in G. P.
(D) -a/2 , b, c are in GP
(More than one are correct, and please try to explain it)​

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

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.

can i see the following ?

step-by-step explanation: