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GATE2019-1-26

  1. GATE2019-1-98
  2. GATE2019-1-98
  3. GATE2019-1-98
  4. GATE2019-1-98

The set of equations

$$x+y+z=1$$

$$ax-ay+3z=5$$

$$5x-3y+az=6$$

has infinite solutions, if $a=$

  1. $-3$
  2. $3$
  3. $4$
  4. $-4$
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