The 8th term of an ap is 17 and 19 term is 39 find the common difference
Answers
Answered by
1
Answer:
2
Step-by-step explanation:
a+7d=17
a+18d=39
________
-11d= -22
d= 2
Answered by
1
Answer:2
Step-by-step explanation:
t8=a+(n-1)d
17=a+7d. -eq1
t19=a+(n-1)d
39=a+18d -eq2
eq1 = eq2
a+7d-17=a+18d-39
a-a+7d-18d= -39+17
-11d= -22
d= -22/-11
d = 2
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