2 years ago

15,12,9 find the nth term

1 answer:

3 0

Series is 15, 12, 9…,
Difference between terms is 3
By Arithmetic progression

a_{n}=a_{1}+(n-1)d
a_n = the nᵗʰ term in the sequence
a_1 = the first term in the sequence
d = the common difference between terms

So nth term is a(n) = 15 + (n-1)*3
= 15+ 3n -3
= 12 + 3n

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Adiya said that the first step to solving the quadratic equation x2 + 6 = 20x by completing the square was to divide 6 by 2, squ

maksim [4K]

Answer:

No, it is incorrect.

Step-by-step explanation:

The quadratic equation is

$x^2+6 = 20x$ or $x^2-20x+6=0$ . To complete square we take the coefficient of x divided by 2, square that value and add the result to both sides. In the equation given the number to do the process is 20, not 6, then the solution method is incorect.