Find the value of (1 + 3 + 5 + 7 + 9 + 11 + 13 + 15).
64
49
36
25
We know that, sum of n consecutive odd integers starting from 1 is equal to n2. Here the total number of consecutive odd integers is 8. Thus, n = 8 and their sum is 82=64.
Multiplicative inverse of
1) -7/9
2) 13/15
3) 1/3×4/7
4) -13/11×1/5