In a go the fourth term is 48 and the eighth term is 768 find the tenth term
Answers
Step-by-step explanation:
a4= a+ 3d = 48 (1)
a8= a+7d = 768 (2)
(2) - (1)
a + 7d = 768
a + 3d = 48
- - -
4d = 720
d = 180
a+ 3(180) = 48
a = 48- 560
a= - 512
a10 = a+ 9d
= 1620 -512
= 1108
Answer:
1128
Step-by-step explanation:
a+3d=48---------(1)
a+7d=768--------(2)
From equation (1) & (2) we get,
a+3d=48
a+7d=768
- - -
-----------------
-4d= -720
So, d=180
substituting value of 'd' in equation (1)
a+3d=48
a+3(180)=48
a=48-540
a=-492
Now, tenth term will be a+9d------- (3)
Putting value of 'a' and 'd' in equation (3)
(-492)+[9×(180)]
=(-492)+(1620)
=1128 Ans!!!!!!
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