How many terms are there in the AP 11,18,25,32,39,....,207
Answers
Answered by
10
Answer:
a1 =11
a2=18
d=18-11=7
an=a+n-1*d
207=11+n-1*7
196=n-1*7
28=n-1
n=29
Answered by
1
Answer:
Step-by-step explanation:
a=11
d=7
An=207
An=a+(n-1)d
207=11+(n-1)7
207-11=7n-7
196+7=7n
203=7n
n=203/7
n=19
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