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find the 20th term from the last term of an AP 3,8,13,.....253.
ANSWER
here AP can be written in reverse order as
253,248,243,238.........(because d=5)
a=253
d= -5
n=20
an=?
we know that
A20=a+19d
=253+19× -5
=253 - 95
a20= 158
therefore 20th term from the last term is 158
please mark me as
ANSWER
here AP can be written in reverse order as
253,248,243,238.........(because d=5)
a=253
d= -5
n=20
an=?
we know that
A20=a+19d
=253+19× -5
=253 - 95
a20= 158
therefore 20th term from the last term is 158
please mark me as
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