Question

find the 12th term from end of an ap 3,5,7,9,.....,201

Answer 1

$\underline{\bold{Answer:-}}$



Given AP:-

$3, \: 5, \: 7, \: 9,........201$


First term a = 3

Common Difference d = ( 5 - 3 ) = 2

Last term an ( l ) = 201

n = 12th from the end

$nth \: \: term \: \: from \: \: the \: \: end \\ \\ = > l - (n - 1)d \\ \\ 12th \: \: term \: \: from \: \: the \: \: end \\ \\ = > 201 - (12 - 1) \times 2 \\ \\ = > 201 - 24 + 2 \\ \\ = > 201 - 22 \\ \\ = > 179.$

Hence, the 12th term from the end is 179.



$\textbf{Hope it will helps!}$