Question

if the first term of an ap is 20 and second term is 19 1/4 then common difference is

Answer 1

$\huge\mathfrak{Solution :}$

${a_1}$ = 20

${a_2}$ = $19 \frac{1}{4}$

${a_2}$ = (4 × 19 + 1) / 4

${a_2}$ = 77 / 4

Now,

Common difference , d = ${a_1}$ - ${a_2}$

$d \: = \: \frac{77}{4} - 20 \\ \\ \\ d \: = \: \frac{77 - 80}{4} \\ \\ \\ d \: = \: \frac{ - 3}{4}$

$\huge\mathbb{Hope \ this \ helps.}$

Answer 2

Hii ☺!!






First term ( a ) = 20



And,

Second term = 19 1/4 = 77/4.



Therefore,


common difference ( d ) = 77/4 - 20 = 77 - 80/4 = -3/4