A) \[-\,\,55\]
B) 55
C) \[-\,\,56\]
D) 56
Correct Answer: A
Solution :
\[({{1}^{2}}-{{2}^{2}})+({{3}^{3}}-{{4}^{2}})+...+({{9}^{2}}-{{10}^{2}})\] \[=(1+2)(1-2)+(3+4)(3-4)\]\[+...+(9+10)(9-10)\] \[=-\,\,3-7-11-15-19=-\,\,55\]You need to login to perform this action.
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