(i) For which values of a and b does the following pair of linear equations have a
infinite number of solutions?
2x + 3y=7
(a - b) x + (a + b) y= 3a +b-2
flinar quations have no
nel.
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Answer:
2x+3y=7. (a-b)x+(a+b)y=3a+b-2
2. 3. 7
----=-------=-----------
a-b a+b. 3a+b-2
2a+b=3a-b ,. 9a+3b-6=7a+7b
a-5b=0.-(i) ,. 2a-4b-6=0-(ii)
on mul. 2 in eq. (i) and sub. from (ii)
2a-4b -6=0
2a-10b=0
-. +
__________
6b=6
b=1
on substituting b=1,in eq (i)
a-5=0
a=5
bhai bhot mehnat se type kiya hai plz like kar dena
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