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श्रेणी $1 + i^2 + i^4 + i^6 + ..... + i^{2n}$ का मान क्या है?

यदि $n$ एक धनात्मक पूर्णांक है,तो $\left( \frac{1 + i}{1 - i} \right)^{4n + 1} = $

समीकरण $ix^2 - 4x - 4i = 0$ के मूल हैं

मान ज्ञात कीजिए: $\left[i^{18}+\left(\frac{1}{i}\right)^{25}\right]^{3}$.

यदि $\frac{(1+i) x-i}{2+i}+\frac{(1+2 i) y+i}{2-i}=1$,तो $(x, y)$ का मान ज्ञात कीजिए।

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