Math, asked by friends21, 1 year ago

find sum of 31^2+32^2.............+60^2

Answers

Answered by Anonymous

2

A=62

D=2

An=120

An= A+(N-1)D

120=62+2N-2

120-60=2N

60=2N

N=30

Sn=N/2(A+An)

S30= 15(62+120)

S30=15 × 182

S30= 2730

Previous Question

Next Question

Similar questions

Environmental Sciences, 6 months ago

The details of beneficiary (ies) any significant comment received from them; please quote:...

Biology, 6 months ago

give any two reasons that potato is planted by cutting its tuber.

English, 6 months ago

Kaleel wrote a letter to the editor...

Science, 1 year ago

write the full form of CSC...

History, 1 year ago

how to memories history dates class 10 no cheating only if u know thn answer thn only i will mark brainliest !!!!!!!!!!!!!!!!

Math, 1 year ago

1 trillion is equal to how many crores in indian rupees...

Math, 1 year ago

The decimal expansion of the rational number 43 upon 2 whole power 4 into 5 cube will terminate after how many places of decimal...

Math, 1 year ago

The cost of one share is rupees x and the cost of one table is rupees and y then find the cost of 5 years and 6 tables...