Find the sum of the first 90 terms of the sequence -4,-1,2,5,8
1 answer:
Answer:
1655
Step-by-step explanation:
Note the common difference d between consecutive terms of the sequence
d = - 1 - (- 4) = 2 - (- 1) = 5 - 2 = 8 - 5 = 3
This indicates the sequence is arithmetic with sum to n terms
=
[ 2a₁ + (n - 1)d ]
Here a₁ = - 4, d = 3 and n = 90, thus
=
[ (2 × - 4) + (89 × 3) ] = 45(- 8 + 267) = 45 × 259 = 1655
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Answer/Step-by-step explanation:
Quotient is simply the ratio of the first numerator to the second numerator:
Let's are two fractions in same terms.
Thus, {Divided by a fraction is equal to multiplied by its reciprocal}
=
Quotient is simply the quotient of their numerators.
Example could be:
2 is first numerator and 3 is the second numerator.
<u><em>~lenvy~</em></u>