Question

संख्या 100 प्राप्त करने के लिए एक से लेकर कितनी क्रमागत विषम संख्याओं का योग करेंगे? a)9 b)6 c)10 d)11​

Answer 1

Answer:

ten is your correct answer

Answer 2

Given : संख्या 100 प्राप्त करने के लिए एक से लेकर क्रमागत विषम संख्याओं का योग

To Find : कितनी क्रमागत विषम

Solution:

Direct

Sum of first n odd  numbers = n²

n² = 100

=> n = 10

Detailed :

Let say first n odd numbers adds up to 100

=> 1 + 3 + 5 + 7 + ... +   nth term

a = 1  , d  = 2  

number of terms = n

S = (n/2)(2a  + (n - 1)d)

= (n/2)(2(1) + (n - 1)2)

=(n/2) ( 2 + 2n - 2)

= (n/2) 2n

= n²

n² = 100

=> n = 10

Hence 10 is the correct answer

Learn more:

Find the sum of first n odd natural numbers. - Brainly.in

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