Question

If the first term of an AP is 4 and the common difference is -4, then the $5^{th}$ term will be .

• A. 12
• B. -12
• C. -8
• D. 4

Answer 1

The correct option is B -12

The $n^{\text{th}}$ term of an AP with first term $a$ and common difference $d$ is given by
$a_n=a+(n-1)d.$

Given $a=4$ and $d=-4.$
$\therefore a_5$$=4+(5-1)(-4)=4-16=-12$