tlonggg bngettt plisssss

1. f(g(2) = f( -2(2) + 1)
              = f(-3)
              = 3.-3 - 5
              = -14

2. jawabanya :  5akar2

4. S8 = 2.64 + 7.8 + 6
= 128 + 56 + 6
= 190

S3 = 2.9 + 7.3 + 6
= 18 + 21 + 6
= 45

S8 - S3 = 190 - 45
= 145