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Maths-

General

Easy

Question

The value of λ such that the system $x minus 2 y plus z equals negative 4 comma 2 x minus y plus 2 z equals 2 comma x plus y plus lambda z equals 4$
has no solution is

0
1
-1
3

The correct answer is: 1

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Let $A equals open parentheses table row cell negative 5 end cell cell negative 8 end cell cell negative 7 end cell row 3 5 4 row 2 3 3 end table close parentheses comma B equals open parentheses table row cell x end cell row cell y end cell row cell z end cell end table close parentheses$ If AB is a scalar $left parenthesis not equal to 0 right parenthesis$ multiple of B, then $x plus y equals$

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