Question

3.-3,-8,-13,-18,... a=__
d=__​

Answer 1

a=-3
d=-8-(-3)=-5
This is the answer

Answer 2

Answer:

10th

Maths

Arithmetic Progressions

General Formula for nth Term

Which term of the AP : 3, 8...

MATHS

avatar

Asked on December 26, 2019 by

Shefali Garg

Which term of the AP : 3, 8, 13, 18,........, is

78 ?

EASY

Help best friend

Study later

ANSWER

The given sequence is 3, 8, 13, 18, ....78.

'a' = 3, 'd' = 5, last term = 78, 'n' = ?

t

n

=a+(n−1)d

⟹78=3+(n−1)5

⟹78=3+5n−5

⟹78=5n−2

⟹5n=80orn=16.

The 16th term is 78.