Mathematics · Sequences and Series
समान्तर श्रेढ़ी (A.P.) (a1, a2, ..., an) का सार्व अंतर (common difference), समान्तर श्रेढ़ी (b1, b2, ..., bn) के सार्व अंतर से 2 अधिक है। यदि a40 = −159 और b100 = −70, तथा a70 = b70 है, तो a1 बराबर है:
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