Which of the following functions is the ...

Which of the following functions is the solution of the differential equation ` dy/dx+2y=0`?
`a) y=-2e^(-x)`
`b) y=2e^x`
`c) y=e^(-2x)`
`d) y=e^(2x)`

Verified by Experts

The correct Answer is:

D

`mu=0.54, R_2=16g+mg, R_1=muR_2`
`rarr R_1xx10 cos 37^@=16gxx5xsin 37^@+mgxx8sin3^@`
`rarr 8R_1=48g+24/5mg`
`rarr R_2=(48g+24/5mg)/(8xx0.54)`

`rarr16g+mg=(240g+24mg)/(5x8x0.54)`
`rarr 16+m=(240+24m)/(40xx0.54)`
`rarr m=44kg`

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