Question

find t4 sum of first 25 odd natural numbers​

Answer 1

The 25 odd natural number are:-

1,3,5,7,9,11,13,15,17,19,..................49

therefore,

the sum of 25 odd numbers are 625 (ans)....

Answer 2

Step-by-step explanation:

odd natural nos in AP

t4= a+ (n-1)d

=1+(4-1)2

= 1+6=7

sum of First 25 odd natural nos =n/2(2a+(n-1)d)

25/2(2+24×2)

25/2(50)

25×25

625