Question 1204114
<pre>
The first and the last term of an arithmetic progression are -0.5 and 140.5 respectively. If the number of terms in the sequence is 48, find it's common difference 

<font color = red><font size = 4><b>Common difference (d)</font></font></b> = {{{matrix(1,9, matrix(1,5, Last, term, "-", First, term)/matrix(1,7, Last, term, number, "-", First, term, number), "=", (140.5 - - .5)/(48 - 1), "=", (140.5 + .5)/47, "=", 141/47, "=", highlight(highlight_green(highlight(3))))}}}</pre>