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If the system of linear equations x1+2x2...

If the system of linear equations `x_1+2x_2+3x_3=6,\ x_1+3x_2+5x_3=9,\ 2x_2+5x_2+a x_3=b` is consistent and has infinite number of solutions, then- `a in R-{8}a n d\ b in R-{15}` `a=8,\ b` can be any real number `a=8,\ b=15` `b=15 ,\ a` can be any real number

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