Question

Знайдіть суму перших шестичленів геометричної прогресії(Bn ), якщо b1 =5, q=2 СРОЧНО​

Answer 1

Sn=b1(1-q^n) / 1-q

S6=5(1-2^6)/1-2=5(1-64)/-1=5×(-63)/-1=-5×(-63)

=315

Answer 2

Classification: G

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