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ddd [48]
3 years ago
7

-18,-13,-8,-3,.... Find the above sequential formula

Mathematics
1 answer:
zhuklara [117]3 years ago
5 0

The first term (a) is - 18

You add 5 to get to the next term. Or you can solve it by taking any 2 consecutive terms and find their difference.

Formula

d = t4- t3

Givens

t4 = - 3

t3 = - 8

Solution 1

d = t4 - t3             Substitute

d = -3 -  ( - 8)        Remove the brackets

d = -3 + 8             Combine  

d = 5                    Difference

Remark

Find the general formula

tn = - a + (n - 1)d      Substitute

So term 20 =           Example    

t20 = -18 + (20 - 1)*5 Combine the inside of the brackets. Remove the brackets

t20 = - 18 + 19*5          Combine 19 and 5          

t20 = -18 + 95              "Subtract"

t20 = 77                        Answer

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Can someone please answer this, ill give you brainliest Would be very appreciated.
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Explanation:

f(x) = (x-4)(x+2)

1) For x-intercept, y will be 0

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  • (x-4) =0, (x+2) = 0
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<u />

<u>x-intercept</u>: (4, 0), (-2, 0)

2) For vertex: x = -b/2a where ax² + bx + c

<u>Quadratic function</u>:

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<u>vertex</u>:

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y: (x-4)(x+2) = (1-4)(1+2) = -9

ordered pair of vertex: (1, -9)

3) For y-intercept, x will be 0

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  • (0-4)(0+2)
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<u>y-intercept</u>: (0, -8)

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