Question

21 +22 + 23 + 24 + ... + 45 या 22 से 45 तक के प्राकृत संख्याओं का योग
होगा?​

Answer 1

Answer:

Step-by-step explanation:

I think answer is 50

Answer 2

Answer:

825

Step-by-step explanation:

a1=21, a2=22, last term(an)=45 and d=22-21=1

an=a+(n-1)d

45=21+(n-1)1

45-21=n-1

24=n-1

n=25

Now, Sum of 25 terms of given A.P.

Sn=n/2(a+l)

S25=25/2(21+45)

$S25= \frac{25}{2} \times 66</p><p>$

S25=825