Question

Diket barisan bilngan dg pola Sn = 2n* - 5n .. suku ke 5 barisan tsb adl....

Answer 1

Sn = 2n² - 5n
S1 = 2.1² - 5.1 = 2-5 = -3
S2 = 2.2² - 5.2 = 8-10 = -2
S3 = 2.3² - 5.3 = 18 - 15 =3
S4 = 2.4² - 5.4 = 32 - 20 = 12
S5 = 2.5² -  5.5 = 50 - 25 = 25
HP = (-3, -2, 3, 12, 25)