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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, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, 10
According to the question it is an arithmetic progression.
t12 = 10
a + 11d = 10
3 + 11d = 10
d = 7/11
Hence, a1 = 3 + 7/11 = 40/11
Similarly find the other arithemetic means we get 
a2= 47/11, a3 = 54/11, a4 = 61/11, a5 = 68/11, a6 = 75/11, a7 = 82/11, a8 = 89/11, a= 96/11, a10 = 103/11
Find the mean of 10 numbers we get 6.5.
Answered by Sneha shidid | 22 Apr, 2019, 10:03: AM
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