if the 13th term and 22nd term of AP are 33 and 57.75 respectively. find the 31st term ?
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a+12d=33
a+21d=57.75
solve both u will get d=2.75 and a=0
then apply the formula to get 31th term and the answer is 82.5
a+21d=57.75
solve both u will get d=2.75 and a=0
then apply the formula to get 31th term and the answer is 82.5
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