# Find #sum_1^7 (1+n^2)#?

##### 1 Answer

Dec 8, 2016

#### Answer:

#### Explanation:

Using the identity

Hence

#=(7xx8xx15)/6=140#

Hence

**Check** -

Dec 8, 2016

Using the identity

Hence

#=(7xx8xx15)/6=140#

Hence

**Check** -

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