Question

nᵗʰ term of 4+9+14+... is​

Answer 1

Answer:

The sequence is 4, 9, 14, 19, ....89.

Given,

'a' = 4, 'd' = 5, last term = 89, 'n' = ?

t

n

=a+(n−1)d

⟹89=4+(n−1)5

⟹89=4+5n−5

⟹89=5n−1

⟹5n=90orn=18

89 is the 18th term.

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