Question

find the 20th term from the last term of the AP 4 9 14 dot dot dot dot 254

Answer 1

AP:4,9,14.....,254

Here a=4,d=9-4=5

=l-(n-1)d

here l=254

=254-(20-1)5

=254-(19)5

=254-95

=159

Therefore the value 20th term from last is 159

Answer 2

Mark as a brainlist dood plz

Answer:

Step-by-step explanation

a=4

d=5

N=?.......

Tn=a+(n-1)d

254=4+(n-1)5

254=4+5n-5

254=(-1)+5n

255=5n

N=55

::;;;;;;

T20 =a+(n-1)d

=4+(55-1)5

=4+54×5

=4+270

=274

Therefore t20 is 274