mikey952
22.03.2021 •
Mathematics
Write all the terms of algebraic expression A + 2B - 3 C
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Ответ:
2a + 2b + 3c
Step-by-step explanation:
(3a_2b + 4c ) +(3b _2c) _ (a _ b_c )
3a _2b + 4c + 3b _2c _ a_b_c
3a_a + 3b +b _2b + 4c + c _ 2c
2a + 2b + 3c
Ответ:
a = 4, d = 5 - 4 = 1, n = 150
Sn = n/2[2a + (n - 1)d]
S(150) = 150/2[2(4) + (150 - 1)1] = 75[8 + 149] = 75(157) = 11,775