Exercise 1 1. Write three examples for each of the following variables in your science concern: (a) Qualitative variables. (b) Continuous variables (c) Discrete variables. 2. Write the elements of the following: (like: y = y3 + y2 + ys) (i) (y, -3) (ii) Ex (ii) (x, - 2y, +10) 3. Write the limits of the following using summation expression: [like: (xi - y) + (x2 - y2) + + (x10 - Y10) = (x; -y)] 10 (i) x + x + x +.........+ x) (ii) (Xi+y) + (x2+y2) + + (x10+y10) (iii) xy, +x}y+x}y, +.......+ x y 4. Depending on the values of x and y find the values of these expressions: y Yi = 5, 8, 2 X;= 7, -2,4 (i) xy, (ii) (x - y) (iii) Ex (Ex)? n (x)(y) (iv) Exy n (v) (x,-8) (vi) x, -8 (vii) (y; -10) 2x Exercise 1 1. Write three examples for each of the following variables in your science concern: (a) Qualitative variables. (b) Continuous variables (c) Discrete variables. 2. Write the elements of the following: (like: y = y3 + y2 + ys) (i) (y, -3) (ii) Ex (ii) (x, - 2y, +10) 3. Write the limits of the following using summation expression: [like: (xi - y) + (x2 - y2) + + (x10 - Y10) = (x; -y)] 10 (i) x + x + x +.........+ x) (ii) (Xi+y) + (x2+y2) + + (x10+y10) (iii) xy, +x}y+x}y, +.......+ x y 4. Depending on the values of x and y find the values of these expressions: y Yi = 5, 8, 2 X;= 7, -2,4 (i) xy, (ii) (x - y) (iii) Ex (Ex)? n (x)(y) (iv) Exy n (v) (x,-8) (vi) x, -8 (vii) (y; -10) 2x