which term of qn ap 7,13,19,,,205 is 115
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Answer:
= a+(n-1)d
=7+(115-1)6
=7+(144×6)
=7+864
=871
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make sure
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- AP:7,13,19---205
From the question we can say;
- A=7
- D=A2- A1 =13-7=6
- An=115
- 115 is which term,ie,N
By the formula:
Putting values;
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