Question

without adding find the sum of 1st 25 even numbers​

Answer 1

Answer:

Hey buddy your answer is in the given attachment.....

Step-by-step explanation:

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Answer 2

Answer:

2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50

These are the first 25 even numbers

a1=2, a2=4

d= a2-a1=4-2=2

d=2,a=2,n=25,Sn=?

Sn=n/2[2a+(n-1) d]

S25=25/2[4+48]

S25=25/2(56)

S25=25×26

S25=650