Asked by Kamil
                The fourth term of an ap is 1 less than twice the second term. If the sixth term is 7, find the first term. 
            
            
        Answers
                    Answered by
            Reiny
            
    Just translate into Math using your definitions of an AP
a+5d = 7 **
a+ 3d = 2(a+d) - 1
a + 3d = 2a + 2d - 1
-a + d = -1 ***
add ** and ***
6d = 6
d = 1
back in **
a + 5=7
a = 2
the first term is 2
check:
sequence is 2,3,4,5,6,7,8, ...
Is the fourth term less than twice the second by 1 ? YES
Is the 6th term equal to 7 ? YES
All is good.
    
a+5d = 7 **
a+ 3d = 2(a+d) - 1
a + 3d = 2a + 2d - 1
-a + d = -1 ***
add ** and ***
6d = 6
d = 1
back in **
a + 5=7
a = 2
the first term is 2
check:
sequence is 2,3,4,5,6,7,8, ...
Is the fourth term less than twice the second by 1 ? YES
Is the 6th term equal to 7 ? YES
All is good.
                    Answered by
            Issabella
            
    The forth term of an A.P is one less than twice the 2nd term. If the sixth term is 7, find the first term
    
                    Answered by
            Isatu
            
    The first term is 2
    
                                                    There are no AI answers yet. The ability to request AI answers is coming soon!
                                            
                Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.