In Exercises 1 to 24, find the first three terms and the n eighth term of the sequence that has the given nth term. In Exercises 19 and 20, round values to the nearest ten-thousandth. an = (-1)n+1n2

MAT 211Lecture #1 Section 15.1Functions with Several Variables M/W/ F 99:50 AM Coor 199 Office Hours: M/W/F 1:15 3:00 PM ECA 209 R(x)= Revenue function in terms of number of items x P(x)= Profit function in terms of number of items x C(x)= Cost function in terms of number of items x P(x)= R(x) C(x) most of functions depend on more than one variable function with a single variable has a rule that assigns a unique output for every input x> f > y=f (x) Ex.: f(x)= e + 1 or f(x)= 3x +2x+5 2 y= 3x +2x+5 Linear Functions: y= mx+b m= slope (rate of change) b= vertical intercept Ex.: f(x)= 3x+2