Class 11Mathematics1 Complex Numbers and Quadratic Equations: Complex NumbersIntegral power of iota, Algebraic operations and Equality of complex numbers
DifficultIf $x + \sqrt{x^2 + 1} = a$,then $x =$
- A$\frac{1}{2}(a + \frac{1}{a})$
- B$\frac{1}{2}(a - \frac{1}{a})$
- C$(a + a^{-1})$
- DNone of these
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