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Quadratic Equation

Class 9 Mathematics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

MathematicsIf (a_n=n^2+2n), for which (n) will (a_n=80)?Class 9Sequences and ProgressionsExplicit or general ruleHard MathematicsIf (a_n=n^2+n-2) then which term is equal to (70)?Class 9Sequences and ProgressionsExplicit or general ruleMedium MathematicsIf a_n = n^2 + 6n + 5, which term is 252?Class 9Sequences and ProgressionsExplicit or general ruleHard MathematicsIf a_n = n^2 + 5n - 2, which term is equal to 148?Class 9Sequences and Progressionsnth termMedium MathematicsThe sequence (2,6,12,20,\ldots) has general term (a_n=n(n+1)). Which term is equal to (72)?Class 9Sequences and ProgressionsSequencesHard MathematicsWhat is the roster form of R={x: x is an integer and x²=4}?Class 9Number SystemsMedium MathematicsIf W = {x : x is a natural number and x² = 9}, what is the roster form of W?Class 9Common QuestionsGeneral chapter practiceEasy