It is required to find the sum 112 + 122 + 132+ …202
112 + 122 + 132 + …202 = Sum of squares of natural numbers starting from 1 to 20 – Sum of squares of natural numbers starting from 1 to 10.
Note:
112 + 122 + 132 + …202 = Sum of squares of natural numbers starting from 1 to 20 – Sum of squares of natural numbers starting from 1 to 10.
112 + 122 + 132 + …202 = 2870 – 385 = 2485