SOLUTION: f a,b,c and d are in H.P then ab+bc+cd equals A)3ad b)3ac c)3bd d)(a+b)(a-b)

Algebra ->  Sequences-and-series -> SOLUTION: f a,b,c and d are in H.P then ab+bc+cd equals A)3ad b)3ac c)3bd d)(a+b)(a-b)      Log On


   

Question 924501: f a,b,c and d are in H.P then ab+bc+cd equals
A)3ad
b)3ac
c)3bd
d)(a+b)(a-b)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

let a=1%2F2, b=1%2F4, c=1%2F6 and d=1%2F8
When you substitute and check what you get for the answer.

now go to answer options and check which one will give you highlight%283%281%2F16%29%29
start with option A:
3ad=3%281%2F2%29%281%2F8%29=highlight%283%281%2F16%29%29 ...so, option A is your answer