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Explicit Formula

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

MathematicsIf \(a_n=rn+s\), \(a_3=14\), and \(a_{10}=49\), what will be \(a_{15}\)?Class 9Sequences and Progressionsnth termLevel 57Medium MathematicsIf the nth term of a sequence is \(a_n=6n-5\), what will be the 18th term?Class 9Sequences and Progressionsnth termLevel 57Easy MathematicsIf aₙ = 4n² + 7n, what is the value of a₈ − a₃?Class 9Sequences and Progressionsnth termLevel 58Medium MathematicsIf aₙ = n(n + 1)/2, what is the sixth term?Class 9Sequences and Progressionsnth termLevel 61Easy MathematicsIf aₙ = 11n + 2, what is the value of a₄ + a₆?Class 9Sequences and Progressionsnth termLevel 57Medium MathematicsIf a_n = 2 × 5^(n−1), what is the value of a₄ + a₅?Class 9Sequences and ProgressionsGeometric ProgressionLevel 55Medium MathematicsIf aₙ = 3 × 4ⁿ⁻¹, what is the value of a₄ + a₅?Class 9Sequences and ProgressionsGeometric ProgressionLevel 54Medium MathematicsIf aₙ = 64 × (1/2)ⁿ⁻¹, what is the value of a₅?Class 9Sequences and ProgressionsGeometric ProgressionLevel 58Easy MathematicsIf \(a_n=81\cdot\left(\frac{1}{3}\right)^{n-1}\), what is the value of \(a_4\)?Class 9Sequences and ProgressionsGeometric ProgressionLevel 57Easy MathematicsIf \(a_n=\frac{n(3n+5)}{2}\), what is the value of \(a_8\)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhich explicit rule is correct for the sequence (8,20,42,80,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsIf \(a_n=3\cdot2^n+2n^2\), what is the value of \(a_4\)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhat is the general term of the sequence (7,25,61,121,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsIf \(a_n=\frac{n(5n-1)}{2}\), what is the value of \(a_6\)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhich explicit rule is correct for the sequence (2,15,64,257,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhat is the general term of the sequence (4,22,66,148,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsIf \(a_n=7\cdot2^{n-1}+4\), what is the value of \(a_5\)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhich general term is correct for the sequence (3,8,17,32,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsIf \(a_n=\frac{n(4n+1)}{2}\), what is the value of \(a_5\)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 49Expert MathematicsWhich is the correct rule for the sequence (14,31,54,83,\ldots)?Class 9Sequences and ProgressionsExplicit or general ruleLevel 48Expert