Question

Solve these 1st 2 problems

Answer 1

=i⁴⁸⁺¹+i⁶⁸+i⁸⁸⁺¹+i¹¹⁰
=(i⁴⁸)(i¹)+(i⁶⁸)+(i⁸⁸)(i¹)+(i¹¹⁰)
=(i²)²⁴(i)+(i²)³⁴+(i²)⁴⁴(i)+(i²)⁵⁵                 as i²=-1   so
=(-1)²⁴(i)+(-1)³⁴+(-1)⁴⁴(i)+(-1)⁵⁵
=(1)i+1+(1)i+(-1)
=i+1+i-1
=2i (answer)