The 31^ st term of an A.P. whose first two terms are -3 and 4 is … - Vidyadip

MCQ

The $31^{st}$ term of an $A.P$. whose first two terms are $-3$ and $4$ is :

A
$210$
B
$200$
C
$137$
✓
$207$

✓

Answer

Correct option: D.

$207$

Given : $a = -3, d = 4 - (-3) = 7$
$\therefore a_{31}= -3 + (31 - 1) \times 7$
$= -3 + 30 \times 7$
$= -3 + 210 = 207$

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