all genius in physics plzz solve dis question???

Question

write down the diffrentional eq. obeyrd by the field E and B Iin an electromagnetic wave
show ta\hat the eq. is satisfied by:
1)E = A (x+k t)
2)E = A (x - kt)...raise to power 10
3)E = A ln(x+kt)
in each of the above ...find the value of the constant k..(E and A are vector)

Answer 1

Substitute the expressions for E into the differential equation and then simplify to show that it is satisfied.