SOLUTION: Q.1 1.for the following A.p, find the first n for which tn is negative 85,78,71,64, ......... 2.write the following quadratic eq in a standard form ax square bx c =0 and

Algebra.Com
Question 1011795: Q.1
1.for the following A.p, find the first n for which tn is negative
85,78,71,64, .........
2.write the following quadratic eq in a standard form ax square bx c =0 and find the value of a,b and c
2z -5/z z- 6.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39630)   (Show Source): You can put this solution on YOUR website!
Question 1:
Formula for a term in an arithmetic progression, .
is the first term.
n is the index.
d is the common difference, which can be either positive or negative.
-
Your example question uses and .

Question 2:
You ask about a quadratic equation and you show an incorrectly written rational expression, or something included which makes unclear sense.
Answer by MathTherapy(10557)   (Show Source): You can put this solution on YOUR website!

Q.1
1.for the following A.p, find the first n for which tn is negative
85,78,71,64, .........
2.write the following quadratic eq in a standard form ax square bx c =0 and find the value of a,b and c
2z -5/z z- 6. 
, with:

, or 1st term: 85 in this case

 being the term number: (unknown)

 being the common difference: (- 7) in this case

 being the value of the nth term: < 0 in this case

You should get: , or  

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