Question

Find the 20th term of the AP: - 5, - 1, 3, 7, ........,253.
(Please answer correctly and properly with step-by-step explaination.) No SPAM plz....

Answer 1

Answer:

71

Step-by-step explanation:

The nth term of an AP series is Tn = a + (n - 1) d

here first term a is -5

and common difference d is

=4

And n is 20 (As per the question)

Therefore,

$T_{20} = -5+(20-1)4\\\\\\=-5+(19)4\\=-5+76\\\\=71!$

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