For the AP: –3, –7, –11, ..., can we find directly a30 – a20 without actually finding a30 and a20? Give reasons for your answer
NCERT Class X
Mathematics - Exemplar Problems
Chapter _ARITHMETIC PROGRESSIONS
Answers
Answered by
26
Yes we can,
Here, a= -3 and d= -4
By using formula a + ( n -1 )d
Just put n = 30 & 20 and you will get it
Answered by
7
yes
for finding AP we need a and a here is -3 and d will be come A2-a1 come into minus even then we will also get 30 then we can easily put in the formula of general formula arithmetic profession that is a n is equals to A Plus and minus one in today and you will get your answer
hope it will help you please make me as brain list
for finding AP we need a and a here is -3 and d will be come A2-a1 come into minus even then we will also get 30 then we can easily put in the formula of general formula arithmetic profession that is a n is equals to A Plus and minus one in today and you will get your answer
hope it will help you please make me as brain list
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