Question

The first term of an ap is 5,the common difference is 3 and the last term is 80 find the number of terms

Answer 1

Answer:

26

Step-by-step explanation:

A= 5

d = 3

a of n = 80

according to question :-

80= a+(n-1)d

80 = 5 + (n-1)3

80= 5+3n-3

80=2+ 3n

78 = 3n

n = 78/3

= 26

therefore number of terms is 26

MARK ME BRAINLIEST

Answer 2

$\boxed{\boxed{\underline{\huge{\pink{Answer}}}}}$

a=5

d=3

An=80

n=?

$\large{An=a+(n-1)d}$

$\pink{80=5+(n-1)3}$

$\pink{75=(n-1)3}$

$\pink{25+1=n}$

$\boxed{\boxed{\underline{\huge{\green{\mathfrak{N=26}}}}}}$