Question

find the 25th term of the AP: 5,4×1/2, 3×/12,3,......
Pls reply asap.​

Answer 1

ꜱᴏʟᴜᴛɪᴏɴ

ɢɪᴠᴇɴ

ᴛʜᴇ ɢɪᴠᴇɴ ꜱᴇʀɪᴇꜱ ɪɴ ᴀᴩ...

ꜱᴏ,

ᴀ1=5

ᴀ2=2

ᴅ=(ᴀ2-ᴀ1)

=-3

ᴛʜᴇʀᴇꜰᴏʀᴇ ꜰᴏʀᴍᴜʟᴀ ᴏꜰ ɴᴛʜ ᴛᴇʀᴍ..

ᴛɴ=ᴀ+(ɴ-1)ᴅ

ᴛ25=5+(24)-3

=5-72

=-67

ʜᴇɴᴄᴇ,25ᴛʜ ᴛᴇʀᴍ ᴏꜰ ᴛʜᴇ ᴀᴩ ɪꜱ -67

ʜᴀᴠᴇ ᴀ ɴyᴄ ᴅᴀy

Answer 2

Answer:

Given AP is 5, 4_1 /2 , 4, 3_1 /2 , 3, ……….

Here First Term a=5

To Find the nth Term of the above AP

Common Difference

d=4_1 /2 -5= -1/2

n=25

a_n = a+(n-1)d

a_25 = 5 + (25-1)(-1/2)

= -7