Question

If the system of equation 2x+3y=7 and 2ax+(a+b)y=28 represent infinitely many solutions,then.......

a=2b

2a+b=0

b=2a

a+2b=0
these are options

it's my exam tell fast
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Answer 1

Step-by-step explanation:

= 2b

b = 2a

a = -2b

b = -2a

Answer :

B

Solution :

The given system of equations has infinitely many solution, then <br>

<br>

<br>

<br> ALTERNATE SOLUTION : Given equations are

<br>

<br> Matrix form by these equations is

<br> As we know if value of determinant is zero then system of equations have infinitely many solutions. <br> So,

<br>

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