Question

Find the $11th$ term from the last term (towards the first term) of the $AP:10,7,4,...,-62$.

Answer 1

$AP:10,7,4,......,-62$

Common difference from first term $d=-3$

Common difference from last term $d=+3$

Thus,

We can calculate ${11}^{th}$ term from last term towards the first term as written below-

$T_{11}=?,T_l=-62,d=+3$

$T_{11}=a+(n-1)d$

$T_{11}=-62+(11-1)\times 3$

$T_{11}=-32$

${11}^{th}$ term from last term towards the first term is $-32.$