Question

28, 24, 20 ....... are in AP which term of the give ap -64​

Answer 1

QUESTION:

28, 24, 20 ....... are in AP which term of the give ap -64

(correct AP sequence)

ANSWER:

FORMULA USED:

$tn = a + (n - 1)d$

where

$a = first \: term$

$d = common \: differnence$

GIVEN AP HAS

$a = 28$

$d = 24 - 28 \\ d = - 4$

$tn = 28 + (n - 1) - 4 \\ - 64 = 28 - 4n + 4 \\ - 64 = 32 - 4n \\ - 64 - 32 = - 4n \\ - 96 = - 4n \\ n = \frac{ - 96}{ - 4} \\ n = 24$

SO FINAL ANSWER

24th TERM WILL BE-64.