# CBSE Class 11-science Answered

**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..**

Asked by sridhark91 | 21 Apr, 2019, 11:35: AM

Expert Answer

Given that 10 A.M's between 3,10.

Let 10 arithemetic means be 3, a

_{1}, a_{2}, a_{3}, a_{4}, a_{5}, a_{6}, a_{7}, a_{8}, a_{9}, a_{10}, 10According to the question it is an arithmetic progression.

t

_{12}= 10a + 11d = 10

3 + 11d = 10

d = 7/11

Hence, a

_{1}= 3 + 7/11 = 40/11Similarly find the other arithemetic means we get

a

_{2}= 47/11, a_{3}= 54/11, a_{4}= 61/11, a_{5}= 68/11, a_{6}= 75/11, a_{7}= 82/11, a_{8}= 89/11, a_{9 }= 96/11, a_{10}= 103/11Find the mean of 10 numbers we get 6.5.

Answered by Sneha shidid | 22 Apr, 2019, 10:03: AM

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