Question

The third term of an ap is 25 and the tenth trrm is -3 .find the first term and the common difference

Answer 1

$\blue {hello}$
Given-

◆Third term is 25

So,

a3=25
a3=a+2d
a+2d=25----------(1)

===>

$\red {now}$

a10=-3
a+9d=-3-------(2)

$\green \: \boxed{equation \: (1) - (2)}$
-7d=28
d=-28/7


◆d=-4
Put the value of d in equation (1)

===>a+2(-4)=25

◆a-8=25

◆a=25+8

◆a=33

So the first term is 33 & the difference is (-4)

Answer 2

Answer:

answer Upar diya h vha se likho