Question

If tn=2n-5 is the nth term of an A.P., then find its first five terms.​

Answer 1

Answer:

if tn=2n-5

t(1)=2(1)-5

tn=-3

t(2)=2(2)-5

tn=-1

t(3)=2(3)-5

tn=1

t(4)=2(4)-5

tn=3

t(5)=2(5)-5

tn=5

Answer 2

Answer:

The First Five terms are -3, -1, 1, 3, 5.

Step-by-step explanation:

tn = 2n-5

when n = 1

t1 = 2(1) - 5 = 2 - 5 = -3.

when n = 2

t2 = 2(2) - 5 = 4 - 5 = -1.

when n = 3

t3 = 2(3) - 5 = 6 - 5 = 1.

when n = 4

t4 = 2(4) - 5 = 8 - 5 = 3.

when n = 5

t5 = 2(5) - 5 = 10 - 5 = 5.