In the equation x=10x−27, the value of x is
2
1
5
Given: x=10x−27,
⇒ −9x=−27
⇒ x=3
The order of the differential equation whose solution is y=a cos x+b sin x+ce−x is
If x100+2x99+k is divisible by (x+1), then the value of k is