Question

In
an
A.p an= 3, n=8, S.: 192
find the d.​

Answer 1

Step-by-step explanation:

An = 3

a + (8-1)d = 3

a + 7d = 3

S = 192

8/2 { a + 3 } = 192

4 { a + 3 } = 192

a + 3 = 48

a = 45

7d = 3 - a = 3-45 = -42

7d = -42

d = -6

Answer 2

Step-by-step explanation:

FORMULA OF SUM FIRST 'N' TERMS IS GIVEN BELOW

$sn = \frac{n}{2}(2a + (n - 1)d) \\ s8 = \frac{8}{2} (2 \times 3 + (8 - 1)d) \\ 192 = 4(6 +( 7d) \\ \frac{192}{4} = 6 + 7d \\ 48 = 6 + 7d \\ 48 - 6 = 7d \\ 42 = 7d \\ d = 6$

Plz mark as brainlist ✍️✌️❤️❤️❤️