The teacher will be very surprised to see your correct solution 😉
2*pi x1 = ---- 3
10*pi x2 = ----- 3
sum
2*pi 10*pi 0 + ---- + ----- 3 3
=
4*pi
product
2*pi 10*pi 1*----*----- 3 3
=
2 20*pi ------ 9
20*pi^2/9
x1 = -85.870199198121
x2 = -14.6607657167524
x3 = -39.7935069454707
x4 = 2.0943951023932
x5 = 73.3038285837618
x6 = -111.002940426839
x7 = -48.1710873550435
x8 = -2.0943951023932
x9 = 85.870199198121
x10 = 23.0383461263252
x11 = 64.9262481741891
x12 = -90.0589894029074
x13 = -429.350995990605
x14 = 52.3598775598299
x15 = 39.7935069454707
x16 = 60.7374579694027
x17 = 48.1710873550435
x18 = 98.4365698124802
x19 = -23.0383461263252
x20 = -27.2271363311115
x21 = -77.4926187885482
x22 = -64.9262481741891
x23 = -60.7374579694027
x24 = 90.0589894029074
x25 = 77.4926187885482
x26 = -278.554548618295
x27 = -437.728576400178
x28 = -98.4365698124802
x29 = 10.471975511966
x30 = -73.3038285837618
x31 = -10.471975511966
x32 = -265014.284281323
x33 = -35.6047167406843
x34 = 35.6047167406843
x35 = 2088.11191708602
x36 = -605.280184591634
x37 = 27.2271363311115
x38 = 14.6607657167524
x39 = -52.3598775598299
x39 = -52.3598775598299