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If (3a+6b)/(5a+12b) =(12/23) determine the value of (3a2 +5b2 )/(abs) a)9 b)19/2 c)32/3 d)31/3
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- ans is 19/2........3a+6b/5a+12b=12/23 =>after calculating we gt a/b=2/3
now 3a^2+5b^2/ab => 3a/b + 5b/a => 3 *2/3 + 5*3/2 => 2+15/2 => 19/2 - 8 years agoHelpfull: Yes(15) No(0)
- 19/2
this is the right ans - 8 years agoHelpfull: Yes(1) No(0)
- assume 3a+6b=12 &5a+1b=23 solve these two equations you will get a=1 b=1.5 substitute these values in the equation (3a2 +5b2 )/(ab) you get 9.5 which is equal to 19/2 in the options
- 7 years agoHelpfull: Yes(0) No(0)
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