For a given arithmetic sequence, the 82™ term, as, is equal to -539, and the 7" term, a-, is equal to -14. Find the value of the 42"d term, a42

Q: What would be the easy way to figure out the 100th and nth of the sequence:  1, 4, 9, 16, 25, 36,.

A:

Q: Write t15 for the sequence − 3,−6,−12,−24,...

A: Given sequence is -3,-6,-12,-24...   The general term of a geometric sequence with first term a1a1…

Q: The first four terms of an arithmetic sequence are p, 9, 3p - q, and 3p + q. What is the 2010th term…

A: The given arithmetic sequence are  p,9,3p-q,3p+q We have to find 2010 term of the sequence.

Q: Find S10 for the arithmetic sequence 13,15,17,19,21,23,….

A:

Q: In an arithmetic sequence, as = 3, a10 = 58, find a1.

A: We have given In an arithmetic sequence, a5 = 3, a10 = 58

Q: Find a 17 in the sequence 5, -10, 20, -40 ...

A:

Q: Write the first term of the arithmetic sequence whose fourth term is 21 and nineteenth term is 111.

A: Given query is to find the first term of a arithmetic sequence whose fourth and nineteenth term is…

Q: n-1 2) а - -3. 6,

A: Given an = -3 . 16n-1

Q: Find the first term or a1of an arithmetic sequence if a7=21 and a15= 45

A: