The 10th term of an a.p is -27 and the 5th term is -12 what is the 18th term? Find also the sum of its 25 term

4 answers

"10th term of an a.p is -27---> a + 9d = -27
" 5th term is -12" ----> a + 4d = -12

subtract them , the a's drop out and you can find d
then find a

then use your formulas for term(18) and sum(25)

pls I need the answer complete

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Pls I need the answer complete

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