If f(x) = pe^(2x) + qe^x + rx satisfies...

If `f(x) = pe^(2x) + qe^x + rx` satisfies the condition `f(0)=-1, f' (In 2)=31 and int_0^(In4) (f(x)-rx)dx=39/2`, then the value of `(p+q+ r)` is equal to

`P=2, Q=-3, R=4`

`P=-5, Q=2, R=3`

`P=5,Q=-2, R=3`

`P=5, Q=-6, R=3`

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