Question

if a1=5 and a100=-292 then find the a50 using artmatic progression

this in hindi

Answer 1

a = 9 , a + 99d = 292
9+ 99d = 292
99d = 292-9
99d = 283
d = 283/99
a50 = a + 49d = 9 + 49×283/99

now you solve this question