Question

The sum of "n" terms of an arithmetic progression whose first term is 8 and last term is 62 is 700.therefore the A.p consistes of ..........

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Answer 1

HEY MATE YOUR ANSWER IS HERE

★ GIVEN ★

SUM OF AP ( Sn ) = 700

FIRST TERM OF AP ( a ) = 8

LAST TERM OF AP ( l ) = 62

★ FORMULA ★

$sum \: of \: n \: terms \: = \frac{n}{2} ( \: a \: + \: l \: )$

★ SOLUTION ★

$700 = \frac{n}{2} \: (8 + 62) \\ \\ = > 1400 = 70n \\ \\ = > \frac{1400}{70} = n \\ \\ = > 20 = n$

HENCE THERE ARE 20 TERMS IN AP

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