Question 1063744

The sum of the first 5 terms of an AP is 30 and the fourth term is 44 find the common difference and the sum of the first 10 terms 
<pre>d, or common difference = 38
{{{matrix(1,6, (1^st), term, or, a[1], "=", - 70)}}}
Formula for the sum of the 1st 10 terms of the series: {{{S[n] = (n/2)(2a[1] + (n - 1)d)}}}
Substitute 10 for n, - 70 for {{{a[1]}}}, and 38 for d to find the sum of the 1st 10 terms.