Question

on comparing a1/a2,b1/b2,c1/c2 find whether it is consistent or inconsistant 2x-3y=8 ; 4x-6y=9

Answer 1

Here a1=2 ,a2=4,b1=-3,b2=-6,c1=-8,c2=-9
a1÷a2=b1÷b2not =c1÷c2
therefore the pair of equation is inconsistent (parallel)

Answer 2

HERE IS YOUR ANSWER MATE....;

(i) Given : 3x + 2y = 5 or 3x + 2y – 5 = 0 :-

and 2x – 3y = 7 or 2x – 3y – 7 = 0

Comparing the above equations with a1x + b1y + c1=0

And a2x + b2y + c2 = 0

We get,

a1 = 3, b1 = 2, c1 = -5

a2 = 2, b2 = -3, c2 = -7

a1/a2 = 3/2, b1/b2 = 2/-3, c1/c2 = -5/-7 = 5/7

Since, a1/a2≠b1/b2 the lines intersect each other at a point and have only one possible solution.

Hence, the equations are consistent.

(ii) Given 2x – 3y = 8 and 4x – 6y = 9 :-

Therefore,

a1 = 2, b1 = -3, c1 = -8

a2 = 4, b2 = -6, c2 = -9

a1/a2 = 2/4 = 1/2, b1/b2 = -3/-6 = 1/2, c1/c2 = -8/-9 = 8/9

Since, a1/a2=b1/b2≠c1/c2

Therefore, the lines are parallel to each other and they have no possible solution. Hence, the equations are inconsistent.

Hope it's Helpful.....:)