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The sum of the first (n+1) natural numbe...

The sum of the first `(n+1)` natural number is _____.

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The correct Answer is:
`((n+1)(n+2))/(2)`
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PEARSON IIT JEE FOUNDATION-PROGRESSIONS-VERY SHORT ANSWER TYPE QUESTIONS
  1. In a sequence, if Sn is the sum of n terms and S(n-1) is the sum of (n...

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  2. If Tn = 3n +8, then T(n-1) = .

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  3. The sum of the first (n+1) natural number is .

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  4. For a series in geometric progression, the first term is a and the s...

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  5. In a series, starting from the second term, if each term its previous ...

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  6. All the multiples of 3 form a geometric progression. [True/False]

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  7. If a, b and c are in geometric progression then, a^(2), b^(2) and c^(2...

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  8. If every term of a series in geometric progression is multiplied by a ...

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  9. Geometic mean of 5, 10 and 20 is .

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  10. Sum of the infinite terms of the GP, -3, -6, -12, ... is 3. [True/Fals...

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  11. The reciprocals of all the terms of a series in geometric progression ...

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  12. The nth term of the sequence (1)/(100), (1)/(10000), (1)/(1000000), .....

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  13. Ina series, Tn = x^(2n-2) (x ne 0), then write the infinite series.

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  14. The harmonic mean of 1, 2 and 3 is (3)/(2). [True/False]

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  15. If a, b, c and d are in harmonic progression, then (1)/(a), (1)/(b), (...

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  16. If the AM of two numbers is 9 and their HM is 4, then their GM is 6. [...

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  17. If a, b and c are the arithmetic mean, geometric mean and harmonic mea...

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  18. If the sum of first n terms which are in GP is a(r+1), then the number...

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  19. Write the first three terms of the sequence whose nth term is Tn= 8 - ...

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  20. Write the first three terms of the sequence whose nth term is Tn = 5^(...

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