Math, asked by psolunke22, 11 months ago

answer to get 100 point
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=what answer in 10 secs or you are a born foolish

sivaprasath: 50 x 51/2 = 25 x 51 = 1275

sivaprasath: took 2.2 secnds, XD

sivaprasath: seconds*

psolunke22: no ans is 1264 i think so

psolunke22: ok its right

sivaprasath: no, 1275 is the answer

Answers

Answered by ItsAryan7

Heya!!

_____________________________

1 + 2 + 3 + 4 + ..............+ 50 is an Arithmetic Progression.

$s = \frac{n(n \: + \: 1)}{2}$

Where, n is no. of terms.

Here, n = 50

$s \: = \frac{50 \: ( \: 50 \: + \: 1 \: )}{2} \\ \\ \\ s \: = \frac{50 \: \times \: 51}{2} \\ \\ \\ s \: = \: \frac{2550}{2} \\ \\ s \: = \: 1275$

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Answered by tavilefty666

Hola!

Answer: 1,275

This question can be solved by using arithmetic formula.

Detailed answer is given in the attachment.

Ask me any doubt, in the comment section below.

Thank you

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