Mathematics, 14.07.2020 01:01, toottoot42169
an arithmetic series has first term 160 and common difference d . the sum of the first 25 terms of the series 3500 . find the common difference d.
Answers: 3
= 
[ 2a₁ + (n - 1)d ]
= 3500 , thus
[ (2 × 160) + 24d ] = 3500, that is
= - 
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an arithmetic series has first term 160 and common difference d . the sum of the first 25 terms of t...
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