3 years ago

Arrange the summation expressions in increasing order of their values

1 answer:

3 0

Sum of n terms = a1 (r^n-1/ (r-1)

Sum of first one = 3 * (4^5 - 1) / 3 = 1023
.. 2nd = 5 * (6^2 - 1) / 5 = 35
.. 3rd = 5 ^4 - 1 / 4 = 156
.. 4th = 4 * (5^4 - 1) / 4 = 624

So in increasing order its 2nd, 3rd, 4th and first.

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PLEASE HELP ILL GIVE BRAINLIST <br><br> Write an equation in Standard Form that has roots -4 and 7.

Misha Larkins [42]

Answer:

$x^{2} -3x-28$

Step-by-step explanation:

To find this equation in standard form, first, write it in factored form. This looks like $y=(x+4)(x-7)$ . Then, multiply the polynomials using the FOIL (First, Outside, Inside, Last) method.

Following the FOIL method, you should multiply the first terms in each binomial, $x*x$ , which equals $x^{2}$ .
Then, the outside terms, $x*-7$ . This equals $-7x$ .
Next, the inside terms, $4*x$ $=4x$ .
Finally, the last terms, $4*-7$ , this equals $-28$ .