Find the 12th term from end of the ap -2,-4,-6,........,-100.
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Answered by
323
Solution:-
We have to find out the 12th term of an AP from the end.
So, we have to assume that the last term is the first term and the last term in this AP is -100.
let the first term be -100 and d = 2
a₁₂ = {a + (n-1)d}
= {100 + (12-1)2}
= (-100 + 11 × 2)
= -100 + 22
= - 78
So, the 12th term of the AP from the end will be -78
Answer
We have to find out the 12th term of an AP from the end.
So, we have to assume that the last term is the first term and the last term in this AP is -100.
let the first term be -100 and d = 2
a₁₂ = {a + (n-1)d}
= {100 + (12-1)2}
= (-100 + 11 × 2)
= -100 + 22
= - 78
So, the 12th term of the AP from the end will be -78
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120
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