Question

समांतर श्रेढी 12,15,18,21....132 का अंत से 21 वाॕ पद ज्ञात कीजिए​

Answer 1

Answer:

first see all numbers properly there is addition of three in all so you can add easily and find out the answer.

ans = 72

Answer 2

Answer:

41

Step-by-step explanation:

a=12 d=15-12 an=132 n=?

=3

an=a+(n-1)d

132=12+(n-1)3

132-12=(n-1)3

120=(n-1)3

n-1=120/3

n-1=40

40+1=n

n=41