Question

find the number of term AP whose first term is 46 common difference is -3 and last term is -5​

Answer 1

Answer:

n=18

Step-by-step explanation:

a=46, d=-3, l=-5

l=a+(n-1)d

-5=46+(n-1)(-3)

-51=-3n+3

-54=-3n

54=3n

3n=54

n=54/3

  =18

Answer 2

Answer:

18th term

Step-by-step explanation:

given,

a=46,

d=-3,

l=-5 (last term),

n=?(no.of terms)

we know that,

nth term=a+(n-1)d=l

=46-3n+3=-5

=(-3)(n-1)=-51

=n-1=51/3=17

=n=17+1=18