Question 1098032
<br>If the first term is a and the common difference is d, then the sum of the first two terms is a + (a+d) = a+2d, and the 10th term is a+9d.<br>
{{{2a+d = 4}}}  [the sum of the first two terms is 4]
{{{a+9d = 19}}} [the 10th term is 19]<br>
That is a simple system of two linear equations.  Solve them to find the values of a and d; then use a and d to find the values of the 5th and 6th terms.