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

MathematicsIf \(S_n\) denotes the sum of the first \(n\) natural numbers, which of the following relations is true for \(n>1\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 64Easy MathematicsWhich formula represents the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 63Easy MathematicsWhich is the correct general formula for the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 63Easy MathematicsWhich formula correctly represents S_n, the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 63Easy MathematicsIn the formula \(S_n=\frac{n(n+1)}{2}\) for the sum of the first n natural numbers, what does \(n\) represent?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsWhich is the correct formula for the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsIf the sum of the first n natural numbers is 210, what is n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsIf the sum of the first n natural numbers is 120, what is n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsWhich is the correct formula for the sum of the first (n) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsWhat is the value of (1+2+3+\cdots+25)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsWhat is the sum of the first (10) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Easy MathematicsIf (a_n=4n+(-1)^{n+1}), what will be the value of (a_8)?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsIf (a_n=n^3), what is the formula for (a_n-a_{n-1})?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsIf (a_n=4n^2-1), which is the first term greater than (100)?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsIf (a_n=n^2-6n+13), what is the smallest term value?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsIf (a_n=2^n+n), what is the value of (a_5)?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsFor the sequence with nth term \(a_n=4n^2-3n+1\), which feature establishes that it is a quadratic sequence?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsIf (a_n=3n^2+2), which term is (149)?Class 9Sequences and Progressionsnth termLevel 57Expert MathematicsWhat is the (n)th term of the sequence \(125,25,5,1,\frac{1}{5},\ldots\)?Class 9Sequences and Progressionsnth termLevel 58Expert MathematicsThe (n)th term of an arithmetic sequence is (a_n=15n-23). What is the common difference?Class 9Sequences and Progressionsnth termLevel 58Expert