Question

PLEASE ANSWER FAST ..
EXPLANATION REQUIRED ..​

Answer 1

Answer:

$n = \frac{b}{b - a} . \\ \\ option \: (1) \: is \: correct.$

Step-by-step explanation:

$d = b - a \\ \\ 2a = a + (n - 1)d \\ \\ a = (n - 1)(b - a) \\ \\ n = \frac{a}{b - a} + 1 \\ \\ n = \frac{a + b - a}{b - a} \\ \\ n = \frac{b}{b - a} \: \: .$

Answer 2

Answer:

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