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Questions  

Area of the triangle formed by the lines y – x = 0, x + y = 0 and y = k in square units is

a
2k
b
k2
c
2k2
d
k22

detailed solution

Correct option is B

Vertices of the triangle are (0, 0), (k, k), (– k, k) . Area =12001kk1−kk1=k2

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