Question

find the sum of the following series 4,5 1/2,6 1/2 ......to 37 terms
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Answer 1

$5 \times \frac{1}{2} = > \frac{11}{2} . \\ 6 \times \frac{1}{2} = > \frac{13}{2} . \\ \frac{13}{2} - \frac{11}{2} = > \frac{13 - 11}{2} = > \frac{2}{2} = > 1. \\ n = 37. \\ a = \frac{11}{2} . \\ d = 1. \\ an = a + (n - 1)d. \\ an = \frac{11}{2} + (37 - 1)1. \\ an = \frac{11}{2} + 36. = > 11 + 72 \div 2 \\ \frac{83}{2} . = > 41.5. \\ sn = > \frac{n}{2} \times (a + an). \\ sn = > \frac{37}{2} \times ( \frac{11}{2} + \frac{83}{2} ). \\ sn = \frac{37}{2} \times \frac{94}{2} . \\ sn = > \frac{37 \times 47}{2} . \\ sn = > 86.95.. \\ hopes \: its \: help \: u \: mark \: it \: as \: a \: \\ \: brainlist \: answer \: . \:$