Tutorial Exercise Find the sum. Use the summation capabilities of a graphing utility to verify your result. 6 WE (9i + 8) i = 1 Step 1 Use the following property of summation to find the sum WE i = 1 (9i + 8). i = 1 (a; b) = a; bi i = 1 i = 1 Write the sum using the above property. 6 WE 1 6 (91 + 8) = 6 + i = 1 i = 1