1) a) find the laplace trans form of the following expression: e^7 (6+3t^2- 3 cos 4t +5 sin 2t) + 48(t -3) + u(t + 2) b) find the inverse laplace transform of the following expression e^-2s (4/s+1)

Logical equivalent of the give question is its contrapositive

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.