Question

plzz give me the solution of this question ​

Answer 1

Answer:

441

Step-by-step explanation:

From us the asked question is that we have to give the sum of odd numbers from 11 to 51 while showing the property that sum of first n natural number is n².

Now if we have been asked about numbers from 1 to 51 we could have easily told the answer but here we have given a random number

Now we know that from 1 to 51 there are 26 odd number but we have to answer about numbers from 11 so what's the need of those numbers but we need it now we also know that from 1 to 11 we have 5 odd numbers (1,3,5,7,9)

NOW

FROM 11 TO 51 we will have 21 odd numbers

And we have the property that

sum of first n natural number is n².

so total odd numbers=21

square of 21 = 441

so sum of numbers from 11 to 51 is 441

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