the sum of first 7 term of an AP IS 63 & THE SUM OF NEXT 7TERM IS 161 FIND 28TH TERM
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a+a+d+a+2d+a+3d+a+4d+a+5d+a+6d=63
7a+21d=63
a+3d=9------------>(1)
a+7d+a+8d+a+9d+a+10d+a+11d+a+12d+a+13d =161
7a+70d=161
a+10d=23------------>(2)
From (1) and (2)
7d=14
d=2
a=3
28th term=a+27d
=3+27(2)
=3+54
=57
I hope this is helpful if so mark as brainliest answer plzzz
7a+21d=63
a+3d=9------------>(1)
a+7d+a+8d+a+9d+a+10d+a+11d+a+12d+a+13d =161
7a+70d=161
a+10d=23------------>(2)
From (1) and (2)
7d=14
d=2
a=3
28th term=a+27d
=3+27(2)
=3+54
=57
I hope this is helpful if so mark as brainliest answer plzzz
charu3456:
plzzz mark as brainliest answer plzzz
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