9th sum

### Asked by lovemaan5500 | 15th Jun, 2018, 07:05: AM

Expert Answer:

### Answered by Sneha shidid | 15th Jun, 2018, 09:25: AM

## Concept Videos

- please answer
- 1. Sum of 10 A.M's between 3,10 is..? 2.if (4x+4)/3, 2x+2,3x+3 are in G.P then 4th Term is.. 3.which term of 2-1/root2 +1/4 so on .. is 1/32. 4.sum to n terms of 3.5+4.7+5.9+ so on..
- Define arithmetic mean for an A.P. a, b, c.
- If A
_{1}, A_{2}, A_{3}, …, A_{n}are n arithmetic means between a and b. Find the common difference between the terms. - Find the arithmetic mean between .
- Find the number of arithmetic means between 7 and 71 in such a way that 5
^{th}mean is 27. - Insert 6 numbers between – 6 and 29 such that the resulting sequence is an A.P.
- Between 1 and 31, n numbers have been inserted in such a way that the resulting sequence is an A. P. and the ratio of 7th and (n – 1)
^{th}numbers is 5 : 9. Find the value of n. - If x, y, z are in A.P. A
_{1}is the mean of x & y and A_{2}is the mean of y & z. Then prove that the mean of A_{1}and A_{2}is y.

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