maggie9459
31.07.2019 •
Mathematics
The geometric sequence has 10 members. the sum of members with even indexes is 682 and with impartial is 1364. what is the first member and quotient of this sequence?
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Ответ:
looks like first term = 2 and common ratio = 2
becuase sum oi 10 terms is a1 (r^10 - 1) / (r - 1)
and if we plug in fisrt term a1 = 2 and r = 2 we get
2 * (2^10 - 1) / (2 -1) we get 2046
so first member is 2 and common ratio = 2
Ответ:
Step-by-step explanation:
cos( - theta) = cos theta
cos( -90°)= cos90°= 0 option D