MCQ
${i^2} + {i^4} + {i^6} + ......$થી$(2n + 1)$ પદ સુધી =
- A$i$
- B$ - i$
- C$1$
- ✓$ - 1$
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$\frac{{{x^2}}}{{{a^2}}}\,\, - \,\,\frac{{{y^2}}}{{{b^2}}}\,\, = \,\,1\,$ નો સ્પર્શક હોય , તો .....