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Show that the sum of an AP whose first t...

Show that the sum of an AP whose first term is a, the second term b and the last term c, is equal to `((a+c)(b+c-2a))/(2(b-a))`.

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VK GLOBAL PUBLICATION-ARITHMETIC PROGRESSIONS -PROFICIENCY EXERCISE ( LONG ANSWER QUESTIONS )
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  2. Find the sum of the integers between 100 and 200 that are divisible by...

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  3. Show that the sum of an AP whose first term is a, the second term b an...

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  4. Sum of the first p, q and r terms of an A.P are a, b and c, respectiv...

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  5. If the pth term of AP is 1/q and its q th term is 1/p show that sum of...

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  10. Reshma repays her total loan of Rs 1,75,000 by paying every month sta...

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  11. The students of a shool decided to beautifly the school on the annual ...

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  12. A man saved Rs 200 during the first month, Rs 225 in the second month ...

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  13. A contract on construction job specifies a penalty for delay of comple...

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  14. A manufacturer of wire produced 1400 m wire in the 5 th year and 1600 ...

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  15. Find the middle term of the sequence formed by all three-digit numbers...

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  16. Find the sum of all the two digit numbers which are either multiples o...

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  17. Ramkali required Rs 2500 after 12 weeks to send her daughter to school...

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  19. Find the middle term of the sequence formed by all numbers between 9 a...

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  20. The sums of n terms of three arithmetical progressions are S1, S2a n d...

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