Question

The sum of n terms of AP is 3n²+5n,then which term of the AP is 152.​

Answer 1

Step-by-step explanation:

Tn = 3n²+5n

a = T1 = 3(1)²+5(1) = 8

d = T2 - T1 = 3(2)²+5(2) -8

d = 32 - 8 = 24

tn = a + (n-1)d

152 = 8 + (n-1)24

144 = (n-1)24

6 = n-1

n = 6+1 = 7 ...;):);)

Answer 2

Answer:

the above answer is correct