Question

find the seventh term of an ap whose second term is 13 and fifth term is 25​

Answer 1

Step-by-step explanation:

using tu formula the seventh term is 33

Answer 2

Step-by-step explanation:

Here a2=13

therefore a+(n-1)*d

here let first term be a and common difference be d

.

. . a+(2-1)*d=13

or a+d=13 equation 1

and the fifth term is 25

.

. . a+(5-1)*d=25

or a+4d=25 equation 2

now eq..2-1 we get d=4

now putting the value of d in eq..1 we get

a+4=13

a=9

now the 7th term

a7 = a+(n-1)d

9+(7-1)*4=33