What is the Sum of 'n' terms from the last term of the A.P. if a(1st term) is not given?
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Sum of n terms is
Sn = n/2 [t1+tn]
Please mark it as the brainliest!!!!!
nabeelamirza210:
It is asking u to find 1st term not the formula
okay sorry
Answered by
1
Answer:
Step-by-step explanation:
Check the question again may be it is wrong
it is correct i think
just replace the first term with last term and D with -D, in the sum formula
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