Question

the n -1th term of AP 7,12, 17,22 is​

Answer 1

Answer:

The given A.P. is -7,-12,-17,-22.... Let nth term of A.P. be -82.

Step-by-step explanation:

Hope this will help you !!

Answer 2

Answer:

5n-3

Step-by-step explanation:

Here a=7 and d=5

Formula:

T(n)= a+(n-1)d

t(n-1)=a+(n-2)d

apply a and d in the above formula,

t(n-1)=7+(n-2)5

t(n-1)=7+5n-10

t(n-1)=5n-3

Hope you understand! All the best'!