MCQ
If a relation $\phi$ is defined from set C to set R such that $x \phi y \Leftrightarrow|x|=y$, then which of the following is correct :
- A$(3+2 i) \phi 13$
- B$3 \phi-3$
- ✓$(3+4 i) \phi 5$
- D$(1+i) \phi R$
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$\equiv a_0 + a_1x + a_2x^2 + a_3x^3 + ...... + a_mx^m$ then $\sum\limits_{r\, = \,0}^m {\,\,{a_r}}$ has the value equal to