for an A.P., the sum of its term is 60, common difference is 2 and last term is 18. find the number of term in A.P.
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no. of terms in A.P are n=19^2/108P
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this is required answer
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what ,tell me
which step
a=2n-20...after this
I am not understanding anything
put a=20-2n in (6)
now solving we get quadratic equation, factorise and we get n=15,4
tell me now ,you are understanding or not
hmm..I m trying to solve
thank you ..
for your help
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