Respuesta :

the answer should be close to 0.2217
but if you just want to expand it into series the please tell
e^-1.5

= 1/(e^1.5)

e represents a number in maths as 2.71828...

e^-1.5  = 1/(e^1.5) = 1/(2.71828^1.5)            Simplify with calculator

≈ 0.2231

Hope this simplifies it.