Question

Find the first four terms of sequence whose nth term is (-1^n)×sin(nπ/2)​

Answer 1

Step-by-step explanation:

Given that: T

n

=

n+1

n

2

Then T

1

=

1+1

1

2

=

2

1

,

T

2

=

2+1

2

2

=

3

4

,

T

3

=

3+1

3

2

=

4

9

,

T

4

=

4+1

4

2

=

5

16

∴ The first four terms of the sequence are

2

1

,

3

4

,

4

9

,

5

16

.