Mathematics · Number Series
नीचे दी गई दो-पंक्ति संख्या श्रृंखला में, दूसरी श्रृंखला पहली श्रृंखला के समान पैटर्न का अनुसरण करती है: श्रृंखला 1: -2, 4, 39, 220 श्रृंखला 2: -5, a, b, c 'b' का मान क्या है?
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