SOLUTION: First question: Three numbers re in a arithmetic sequence and their sum is 21 if the first number is increase by 1 second by 3 and the third by 10 the new numbers are in a arithme

Question 1072648: First question: Three numbers re in a arithmetic sequence and their sum is 21 if the first number is increase by 1 second by 3 and the third by 10 the new numbers are in a arithmetic sequence. Find the possible value of the original
Second question: the sum of the first twenty term of the following sequence is 1680 2exponent x + 2 exponent x -1 + 3 2 exponent x +....
Use the formula to calculate the value of x.
Third question: the sum of first and second term of a converge series is 30. The sum of all term is 54 determine the common ratio r, with r>0 and the first term.
Fourth question: the sequence Tn=(n-1) raise to 2 -8 is given.. 1: calculate the first term three terms of the sequence.. 2: which term of the sequence will be more than 56

Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!
.
One question per post PLEASE.

It is THE RULE of this forum.

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