Question
Is the given relation a function? Give reasons for your answer:
f = {(x, x) | x is a real number}
f = {(x, x) | x is a real number}
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If
$(1-\text{x}+\text{x}^{2})^{\text{n}}=\text{a}^{0}+\text{a}_{1}\text{x}+\text{a}_{2}\text{x}^{2}+...+\text{a}_{2\text{n}}\text{x}^{2\text{n}},$find the value of $\text{a}_{0}+\text{a}_{2}+\text{a}_{4}+...+\text{a}_{2\text{n}}.${(4, 2), (4, 3), (5, 1)}