Question

In an arithematic sequence of 6,10,14....
how much more is the 15 th term more than the 10 th term?​

Answer 1

See only pic

ANSWER

(a) 6,10,14,....

Since t

2

−t

1

=t

3

−t

2

Common difference, d=10−6=4

First term a=6

S

n

=

2

n

2a+(n−1)d=

2

n

2×6+(n−1)4=

2

n

12+4n−4=

2

n

4n+8

=n(2n+4)

2n

2

+4n