Question

find the 20th from the last terms of the ap:3,8,13...,253

Answer 1

Hey!!!

AP : 3, 8 , 13 , .. 253

We have,
a = 3
l = 253
d = 8 - 3
=> d = 5

We will use a formula for finding 20th term from last

a20 = l - ( n - 1 )d

=> a20 = 253 - 19(5)
=> a20 = 253 - 95

=> 20th term from last = 158

Hope this helps

Answer 2

20th term from the last term of an AP is given by=)
last term from end = l-(n-1)d
=) 253-(20-1)5
=) 253-19×5
=) 253-95
=) 158

Hence, 158 is the 20th term from the last term of an AP.


Hope it Helps.
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