Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class12  >>  Determinants
0 votes

If the system of linear equations :$x+2ay+az=0,x+3by+bz=0,x+4cy+cz=0$ has a zero solutions then $a,b,c$

$\begin{array}{1 1}(A)\;\text{are in G.P}&(B)\;\text{are in H.P}\\(C)\;\text{satisfy a+2b+3c=0}&(D)\;\text{are in A.P}\end{array}$

Can you answer this question?

1 Answer

0 votes
For non-zero solution,we have
On expanding along $R_1$ we get
$\Rightarrow 2ac=ab+bc$
$\Rightarrow a,b,c$ in H.P
Hence (B) is the correct answer.
answered Apr 24, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App