the 12th term of an ap is -28 and 18th term is -46 find its first term and common differences
Answers
Answered by
2
Answer:
t12=-28
: .a+(12-1)d=-28
a+11d=-28......1
t18=-46
: .a+(18-1)d=-46
a+17d=-46......2
2-1
a+11d=-28
a+17d=-46
----------------
-6d=18
:. d=-3
substituting d=-3 in 1
a-33=-28
a=-28+33
=5
: .first term=5 and common difference=-3
Answered by
7
Answer:
t12=-28
: .a+(12-1)d=-28
a+11d=-28......1
t18=-46
: .a+(18-1)d=-46
a+17d=-46......2
2-1
a+11d=-28
a+17d=-46
----------------
-6d=18
:. d=-3
substituting d=-3 in 1
a-33=-28
a=-28+33
=5
: .first term=5 and common difference=-3
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