Question 1187317
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Use the definition of an arithmetic sequence and do some simple calculations.<br>
The first term is 5.
The second term, 9, is the first term, 5, plus the common difference; so the common difference is 4.  Then...<br>
The 3rd term is the 1st term, plus 2 times the common difference: 5+2(4)=5+8=13
The 4th term is the 1st term, plus 3 times the common difference: 5+3(4)=5+12=17
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The 50th term is the 1st term, plus 49 times the common difference...<br>