Question

find 20 the term from the last term of the AP 3,8,13......253.​

Answer 1

${\bold {\large {\underline {\pink {\mathcal {Arthematic \:progression}}}}}}$

${\bold {\large {\green {\mathcal {given}}}}}$ :- a= 3

d= a2-a1 =》 8-3= 5

an= 253

According to formula

for finding 20th term:

${\bold {\large {\boxed{\pink {\mathcal {a+19d}}}}}}$

$3 + 19(5) = 98$

so the 20th term of this a.p. will be

${\bold {\large {\underline {\purple {\mathcal {98}}}}}}$

Answer 2

Step-by-step explanation:

a=253 ,n=20, d=3-8=-5

a+(n-1)d =an

253+(19)-5

253-95

=158

I hope that it will help you

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