Question

d 7th n 9th term of an ap are 346 n 328 find d 2nd term

Answer 1

Just to restate your question. In the arithmetic progression 7th=346 and 9th=328. Need to find the 2nd term.

Answer 2

9th= 7th +2d
328=346 +2d
then d = -9
7th = 2nd + 5d
2nd = 7th - 5d
= 346 + 45
= 391

Answer 3

a7=a+(7-1)d
d=-9 a7=346
346=a+6*(-9)=a-54
a=346+54=400
a2=400-9=391