Which term of the sequence 12+8 i, 11+6 i, 10+4 i, ………. Is purely real, where `i = sqrt(-1)`

Which term of the sequences 8-6i, 7-4i, 6-2i, …………….is a real number?

Which term of the sequence : 8-6i, 7 - 4i, 6- 2i,.......... is pure imaginary ?

sqrt((-8-6i)) is equal to (where, i=sqrt(-1)

1,1+i,2i,-2+2i,"…."where i= sqrt(-1)

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : (sqrt6+5i)(sqrt6-i/5) .

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : [(1/3+7/3i)+(4+i/3)]-((-4)/3+i) .

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : ((1-i)(2-i)(3-i))/(1+i) .

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : (1-i)^4 .

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : (1 - i) -(-1 + 6i) .

Perform the following by the indicated operations. Express the result in the form x + iy,where x, y are real numbers i = sqrt(-1) : (5+ sqrt2 i)/(1-sqrt2 i) .