Question

if the first two terms of an Ap are 100 and 105 then what is the 21st term of this AP​

Answer 1

HEY MATE !

HERE'S YOUR ANSWER...

SINCE,

a1 = 100

a2 = 105

so, d = a2 - a1 = 105 - 100 =5

NOW, a21 = a + 20d

which is, a21 = 100 + 20(5)

100 + 100= 200

HOPE IT HELPS...