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taxablevalueofelectricfans, if the rate of GST is 12%2) The Sth term and the 21st term of an A.P. are 75 and 183 respectively. Find 81th term of the A.P |
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Answer» an=a+(n-1)d.so,for the 9th term,75=a+8d(1)st equationso,for the 21st trm,183=a+20d(2)nd equationequate both equationsso,12d=108d=9put,d=9 in eq. (1)75=a+72a=3now,we have to find the 81st terman=3+80×981st=3+72081st term =723 |
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