Question

find the value of (-1)ⁿ + (-1)²ⁿ +(-1)²ⁿ+¹ + (-1)⁴ⁿ+2​

Answer 1

Step-by-step explanation:

The formula for f(n)

f=.3 :'x:(_1^y+1)*%y'

Try examples:

f 1

1

f 2

_1r2 - J uses the letter ‘r’ as the division symbol for rational fractions.

f 5

1r5

f 20

_1r20 - J uses the underbar ‘_’ to indicate negative numbers

f 1000

_1r1000

f 1001

1r1001

f 1 2 3 4 5

1 _1r2 1r3 _1r4 1r5

f 10 15 20 25 30

_1r10 1r15 _1r20 1r25 _1r30

Sum of the first 10 terms:

+/ f 1+i.10

1627r2520 = 0.645635

Sum of the first 100 terms:

+/ f 1+i.100

47979622564155786918478609039662898122617r69720375229712477164533808935312303556800 = 0.688172

+/f1 1+i.10

0.645635

+/f1 1+i.100

0.688172

+/f1 1+i.1000

0.692647

+/f1 1+i.10000

0.693097

+/f1 1+i.100000

0.693142

+/f1 1+i.1000000

0.693147