The 7th and 21th term of an AP are 6 and -22 respectively.
Find the 26th term.
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Answer:
the 26th term is -32 for this answer
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Answer:
we apply elimination method for finding 26th term
a+6d=6
a+20d=-22
- - +
-14d=26
d=26/-24
d=-13/12
now put the value d in a+6d=6
a+6d=6
a+6(-13/12)=6
a+(-13/2)=6
2a-13=6×2
2a-13=12
2a=12+13
a=25/2
for finding 26 th term
a+25d=26tern
25/2-13/12=26thterm
150-13/12=26th term
137/12=26th term
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