Matematika 1+3...+77+99tolong di jawab​

princessquitzonulv – April 04, 2023

1+3+...+77+99
tolong di jawab​

[tex]1 + 3 + ... + 77 + 99 \\ pola \: bilangan \: ganjil \\ un = 2n - 1 \\ 99 = 2n - 1 \\ 99 + 1 = 2n \\ 100 = 2n \\ \frac{100}{2} = n \\ n = 50 \\ \\ sn = \frac{n}{2} (a + un) \\ s50 = \frac{50}{2} (1 + 99) \\ s50 = 25(100) \\ s50 = 2500[/tex]

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