HP-2

If a,b,c,d are in HP,then ab+cd+bc =

A. 3ad
B.(a+b)(c+d)
C. 3ac
D. none of these.

4 Answers

dude, always remember what i am gonna say now, whenever u are said no:s are in GP, if they are 3 , take them as 3,4,6

if they r 4 in number, take them as 3,4,6,12

so substituting here a=3 ,b=4 ,c=6 , d=12
we get

ab+cd+bc =108

then we have 3ad=108

so answer is `a` .

i already did what you said.. but u cant guarantee thats the ans bcoz option D is there.. :)

@b555 - i hope u meant 3 nos in HP in ur 1st line :)

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