Hello people,

i need a bit of help with these proofs, its one of those things were i can't sport what to do with the thing next.

1) f(x)=2x +lnx, g(x) = e^2x, prove that gf(x)=4e^4x

2) (cosec x)^4 - (cot x)^4 = (cosec x )^2 + (cot x)^2

3)

P= (2800ae^0.2t)/(1 +ae^0.2t) a=0.12

show that p = 336/(0.12 + e^-0.2t)