Question

If the nth term of a sequence is given by 10n - 18, find its fifth term.

Answer 1

$\sf n ^{th} \: term = 10n - 18$

$\implies \sf {5}^{th} \: term = 10(5) - 18$

$\implies \sf {5}^{th} \: term = 50 - 18$

$\orange{\therefore \sf {5}^{th} \: term = 32}$

Answer 2

Given:

$10n-18$

To find 5th term of the sequence.

So,

We have nth term of the sequence as

$n=10n-18$

Put the value of n as 5 to find 5th term

$5^{th}term=10(5)-18$

$5^{th}term=50-18 \\5^{th}term=32$

Hence, we found the 5th term as 32.