Question

if 7th and 10th term of Ap is 33 and 93 find the first term and common difference​

Answer 1

$a + 9d = 63$

$a + 6d = 33$

Now equating them both

We got,

$3d = 30$

$d = 10$

So insert the value of d in any equation and we will get a i.e, first term

So,

$a + 3d = 33$

In this equation we put the value of

d=10

And we get,

$a = 33 - 3(10)$

$a = 3$

So the value are

d=10

And

a=3

❤ Hope it helped u ❤