Math, asked by jahnavijanu1018, 3 months ago

1+3+5+7 +9 =
Without adding, find the sum of the following numbers
1 + 3 + 5 +7+9+ 11 + 13 + 15 + 17=
1+3+5+7+9+ 11 + 13 + 15 + 17 + 19 +21+ 23 + 25 =

prakhar77780: 1+2+3+4+5+6+7+8+9+

prakhar77780: this one

prakhar77780: to 25

jahnavijanu1018: oh ok

jahnavijanu1018: ss it is correct i mean answer is correct

pradeep230276: ...

jahnavijanu1018: what's this

jahnavijanu1018: dot dot dot

prakhar77780: where do you live

prakhar77780: jahnavi

Answers

Answered by andhadhun

Answer:

169

Step-by-step explanation:

Following is an AP

S=n/2(a+l)

n: no of terms , a: first term , l : last terms

S=13/2(1+25)

S=13×13

S=169

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prakhar77780: I am apologize

jahnavijanu1018: which is mistake

prakhar77780: jahanavi

prakhar77780: in which class ur

jahnavijanu1018: it's ok bro

jahnavijanu1018: iam 8th class

prakhar77780: where do u live

jahnavijanu1018: yy r u asking this brother

jahnavijanu1018: i am studying in a hostel

jahnavijanu1018: now kovid holiday to us

Answered by pradeep230276

Answer:

Friend there is a formula for this

n^2s the formula where n is number of digits

This is only applicable for conductive odd number.

like. 1+3+5+7+9+ 11 + 13 + 15 + 17 + 19 +21+ 23 + 25 =13^2=169

Hope you understand

pradeep230276: is my answer useful

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