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My name is Ann [436]

3 years ago

6

Write the explicit rule for the arithmetic sequence -10, -3, 4, 11,...

1 answer:

Bogdan [553]3 years ago

6 0

a

0

=

4

a

i

=

a

i

−

1

+

7

XXXX

possibly with the restriction 1<=i<=4 if this is not intended to be a continuous sequence

Explanation:

This is a simple arithmetic sequence with a difference of

7

between ascending sequence terms.

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Answer:

Ratio of present ages of Sonal and Manoj = 7:5

Let us consider the ages of Sonal and Manoj to be 7x yrs. and 5x yrs. respectively.

After 10 years, ratio of their ages = 9:7

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or 9 (5x+10) = 7 (7x+10)

or 45x + 90 = 49x + 70

or 49x - 45x = 90 - 70

or 4x = 20

or x = 20/4 = 5 .

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Step-by-step explanation:

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Answer:

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