Question

which term of an ap is 70 if the first term is 120 and the comman difference is -5
Plzzzz it's urgent
solve this

Answer 1

$<b><font face=Copper black size=4 colour=purple>$$<b><marquee direction = "up" > <h3>$Given :

$\mathsf{a_n}$ = 70

$\mathsf{a_1}$ = 120

d = - 5

Now,

$\mathsf{a_n}$ = a + ( n + 1 ) d

70 = 120 + ( n - 1 ) ( - 5 )

70 - 120 = ( n - 1 ) ( - 5 )

- 50 = ( n - 1 ) ( - 5 )

n - 1 = 10

n = 11

So,

11th term = 70

^^"