Mathematics
Senior High
想問說這個D選項如何得知
一等差數列<an>,az=3,a29=-51,若b=2",則下列選項哪些正確?
((A) a = 1
LOR
(C) a + ar +
+a29+30=-720
(E) bis <b20
(B)公差為-2
˙(D)(b)是等比數列
MED
鱼2
解
(S
1+
E
05
Answers
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感恩！瞭解了