Question

જો 3+5+7+9+.... n પદ સુધી = 288, તો n =....

Answer 1

sum of left side ap
3+5+7+9+....n=
n=3+(m-1)2
n=3+2m-2
n=2m+1
m=n-1/2
sum=(n-1)/4[3+n]
288*4=(n-1)(3+n)