Question

Which of the following relations are functions

(i) R1 = {(4,6), (3,9), (-11,6), (3,11)}

(ii) R2 = {(x, x) : x is a real number}

(iii) R3 = {(,

−1



): n is a positive integer}

(iv) R4 = {( x, y) : x, y ∈ R, y

2 = x}

1

a) i, ii, iii & iv b) ii & iii c) ii, iii & iv d) only ii​

Answer 1

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